Table 3.
List of targeted metabolites
| Metabolite group ID | Formula | Exact mass | Pubchem ID | CAS # | KEGG ID | HMDB ID | HMDB super class | HMDB class | HMDB sub class |
|---|---|---|---|---|---|---|---|---|---|
| 1-methyladenosine | C11H15N5O4 | 281.1124 | 27476 | 15763-06-1 | C02494 | HMDB0003331 | Nucleosides, nucleotides, and analogs | Purine nucleosides | NA |
| 1-methylhistamine | C6H11N3 | 125.0953 | 3614 | 501-75-7 | C05127 | HMDB0000898 | Organic nitrogen compounds | Organonitrogen compounds | Amines |
| 1-methyl-L-histidine | C7H11N3O2 | 169.0851 | 92105 | 332-80-9 | C01152 | HMDB0000001 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 1-methylnicotinamide | C7H9N2O+ | 137.0715 | 457 | 3106-60-3 | C02918 | HMDB0000699 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridinecarboxylic acids and derivatives |
| 2,3-dihydroxybenzoic acid | C7H6O4 | 154.0266 | 19 | 303-38-8 | C00196 | HMDB0000397 | Benzenoids | Benzene and substituted derivatives | Benzoic acids and derivatives |
| 2,3-pyridinedicarboxylic acid | C7H5NO4 | 167.0219 | 1066 | 89-00-9 | C03722 | HMDB0000232 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridinecarboxylic acids and derivatives |
| 2-aminoadipic_acid | C6H11NO4 | 161.0688 | 469 | 542-32-5 | C00956 | HMDB0000510 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 2-aminobutyric_acid | C4H9NO2 | 103.0633 | 80283 | 1492-24-6 | C02356 | HMDB0000452 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 2-aminoisobutyric_acid | C4H9NO2 | 103.0633 | 6119 | 62-57-7 | C03665 | HMDB0001906 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 2-aminooctanoic_acid | C8H17NO2 | 159.1259 | 69522 | 644-90-6 | - | HMDB0000991 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 2-deoxyadenosine | C10H13N5O3 | 251.1018 | 13730 | 958-09-8 | C00559 | HMDB0000101 | Nucleosides, nucleotides, and analogs | Purine nucleosides | Purine 2′-deoxyribonucleosides |
| 2-deoxyguanosine | C10H13N5O4 | 267.0968 | 135398592 | 961-07-9 | C00330 | HMDB0000085 | Nucleosides, nucleotides, and analogs | Purine nucleosides | Purine 2′-deoxyribonucleosides |
| 2-hydroxy-3-methylbutyric acid | C5H10O3 | 118.0630 | 99823 | 4026-18-0 | - | HMDB0000407 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| 2-hydroxybutyric acid | C4H8O3 | 104.0473 | 11266 | 600-15-7 | C05984 | HMDB0000008 | Organic acids and derivatives | Hydroxy acids and derivatives | Alpha hydroxy acids and derivatives |
| 2-hydroxyglutaric acid | C5H8O5 | 148.0372 | 43 | 2889-31-8 | C03196 | HMDB0000694 | Organic acids and derivatives | Hydroxy acids and derivatives | Short-chain hydroxy acids and derivatives |
| 2-hydroxyisocaproic acid | C6H12O3 | 132.0786 | 92779 | 498-36-2 | - | HMDB0000665 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| 2-isopropylmalic acid | C7H12O5 | 176.0685 | 77 | 3237-44-3 | C02504 | HMDB0000402 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| 2-oxo-4-methylthiobutyric acid | C5H8O3S | 148.0194 | 473 | 583-92-6 | C01180 | HMDB0001553 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| 3-aminobutyric_acid | C4H9NO2 | 103.0633 | 10932 | 541-48-0 | - | HMDB0031654 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 3-aminoisobutyric_acid | C4H9NO2 | 103.0633 | 64956 | 144-90-1 | C05145 | HMDB0003911 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 3-guanidinopropionic_acid | C4H9N3O2 | 131.0695 | 67701 | 353-09-3 | C03065 | HMDB0013222 | Organic nitrogen compounds | Organonitrogen compounds | Guanidines |
| 3-hydroxybenzoic acid | C7H6O3 | 138.0317 | 7420 | 99-06-9 | C00587 | HMDB0002466 | Benzenoids | Benzene and substituted derivatives | Benzoic acids and derivatives |
| 3-hydroxybutyric acid | C4H8O3 | 104.0473 | 441 | 300-85-6 | C01089 | HMDB0000357 | Organic acids and derivatives | Hydroxy acids and derivatives | Beta hydroxy acids and derivatives |
| 3-hydroxy-DL-kynurenine | C10H12N2O4 | 224.0797 | 11811 | 606-14-4 | C03227 | HMDB0011631 | Organic oxygen compounds | Organooxygen compounds | Carbonyl compounds |
| 3-hydroxyhippuric acid | C9H9NO4 | 195.0532 | 450268 | 1637-75-8 | - | HMDB0006116 | Benzenoids | Benzene and substituted derivatives | Benzoic acids and derivatives |
| 3-hydroxyisobutyric acid | C4H8O3 | 104.0473 | 87 | 2068-83-9 | C06001 | HMDB0000023 | Organic acids and derivatives | Hydroxy acids and derivatives | Beta hydroxy acids and derivatives |
| 3-hydroxyphenylacetic acid | C8H8O3 | 152.0473 | 12122 | 621-37-4 | C05593 | HMDB0000440 | Benzenoids | Phenols | 1-hydroxy-4-unsubstituted benzenoids |
| 3-methyl-2-oxovaleric acid | C6H10O3 | 130.0630 | 47 | 1460-34-0 | C00671 | HMDB0000491 | Organic acids and derivatives | Keto acids and derivatives | Short-chain keto acids and derivatives |
| 3-methylbutyrylglycine | C7H13NO3 | 159.0895 | 546304 | 16284-60-9 | - | HMDB0000678 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 3-methylhistamine | C6H11N3 | 125.0953 | 69520 | 644-42-8 | - | HMDB0001861 | Organic nitrogen compounds | Organonitrogen compounds | Amines |
| 3-methyl-L-histidine | C7H11N3O2 | 169.0851 | 64969 | 368-16-1 | C01152 | HMDB0000479 | Organic acids and derivatives | Organic acids and derivatives | Amino acids, peptides, and analogs |
| 3-methylphenylacetic acid | C9H10O2 | 150.0681 | 12121 | 621-36-3 | - | HMDB0002222 | Benzenoids | Benzene and substituted derivatives | Toluenes |
| 3-methylthiopropionic acid | C4H8O2S | 120.0245 | 563 | 646-01-5 | C08276 | HMDB0001527 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| 3-phenyllactic acid | C9H10O3 | 166.0630 | 3848 | 828-01-3 | - | HMDB0000779 | Phenylpropanoids and polyketides | Phenylpropanoic acids | NA |
| 4-aminobutyric_acid | C5H11NO2 | 117.0790 | 119 | 56-12-2 | C00334 | HMDB0000112 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| 4-hydroxyphenylpyruvic acid | C9H8O4 | 180.0423 | 979 | 156-39-8 | C01179 | HMDB0000707 | Benzenoids | Benzene and substituted derivatives | Phenylpyruvic acid derivatives |
| 4-oxo-L-proline | C5H7NO3 | 129.0426 | 107541 | 4347-18-6 | C01877 | - | - | - | - |
| 4-pyridoxic acid | C8H9NO4 | 183.0532 | 6723 | 82-82-6 | C00847 | HMDB0000017 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridinecarboxylic acids and derivatives |
| 5-hydroxyindoleacetic acid | C10H9NO3 | 191.0582 | 1826 | 54-16-0 | C05635 | HMDB0000763 | Organoheterocyclic compounds | Indoles and derivatives | Indolyl carboxylic acids and derivatives |
| 5-methoxy-DL-tryptophan | C12H14N2O3 | 234.1004 | 151018 | 2504-22-5 | - | HMDB0002339 | Organoheterocyclic compounds | Indoles and derivatives | Tryptamines and derivatives |
| 7-methylguanosine | C11H15N5O5 | 297.1073 | 135445750 | 20244-86-4 | C20674 | HMDB0001107 | Nucleosides, nucleotides, and analogs | Purine nucleosides | NA |
| Acadesine | C9H14N4O5 | 258.0964 | 17513 | 2627-69-2 | C04663 | HMDB0062179 | Nucleosides, nucleotides, and analogs | Imidazole ribonucleosides and ribonucleotides | NA |
| Acetylcarnitine | C9H17NO4 | 203.1158 | 7045767 | 3040-38-8 | C02571 | HMDB0000201 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Adenine | C5H5N5 | 135.0545 | 190 | 73-24-5 | C00147 | HMDB0000034 | Organoheterocyclic compounds | Imidazopyrimidines | Purines and purine derivatives |
| Adenosine | C10H13N5O4 | 267.0968 | 60961 | 58-61-7 | C00212 | HMDB0000050 | Nucleosides, nucleotides, and analogs | Purine nucleosides | NA |
| Asymmetric dimethyl arginine | C8H18N4O2 | 202.1430 | 123831 | 30315-93-6 | C03626 | HMDB0001539 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Agmatine | C5H14N4 | 130.1218 | 199 | 306-60-5 | C00179 | HMDB0001432 | Organic nitrogen compounds | Organonitrogen compounds | Guanidines |
| Alanine | C3H7NO2 | 89.0477 | 5950 | 56-41-7 | C00041 | HMDB0000161 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Allantoic acid | C4H8N4O4 | 176.0546 | 203 | 99-16-1 | C00499 | HMDB0001209 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Allantoin | C4H6N4O3 | 158.0440 | 204 | 97-59-6 | C01551 | HMDB0000462 | Organoheterocyclic compounds | Azoles | Imidazoles |
| Alpha-ketoglutaric acid | C5H6O5 | 146.0215 | 51 | 328-50-7 | C00026 | HMDB0000208 | Organic acids and derivatives | Keto acids and derivatives | Gamma-keto acids and derivatives |
| Alpha-ketoisovaleric acid | C5H8O3 | 116.0473 | 49 | 759-05-7 | C00141 | HMDB0000019 | Organic acids and derivatives | Keto acids and derivatives | Short-chain keto acids and derivatives |
| Arachidonoylcarnitine | C31H54NO4 | 504.4053 | 137628528 | 36816-11-2 | - | HMDB0006455 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Arachidoylcarnitine | C27H53NO4 | 455.3975 | 53477833 | - | - | - | - | - | - |
| Arginine | C6H14N4O2 | 174.1117 | 6322 | 74-79-3 | C00062 | HMDB0000517 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Argininosuccinic acid | C10H18N4O6 | 290.1226 | 16950 | 2387-71-5 | C03406 | HMDB0000052 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Asparagine | C4H8N2O3 | 132.0535 | 6267 | 70-47-3 | C00152 | HMDB0000168 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Aspartic acid | C4H7NO4 | 133.0375 | 5960 | 56-84-8 | C00049 | HMDB0000191 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Atrolactic acid | C9H10O3 | 166.0630 | 1303 | 515-30-0 | - | HMDB0142137 | Benzenoids | Benzene and substituted derivatives | NA |
| Beta_alanine | C3H7NO2 | 89.0477 | 239 | 107-95-9 | C00099 | HMDB0000056 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Beta-hydroxyisovaleric acid | C5H10O3 | 118.0630 | 69362 | 625-08-1 | - | HMDB0000754 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| Betaine | C5H11NO2 | 117.0790 | 247 | 107-43-7 | C00719 | HMDB0000043 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Beta-muricholic acid | C24H40O5 | 408.2876 | 119473 | 39016-49-4 | - | HMDB0000865 | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives |
| Butenoylcarnitine | C11H19NO4 | 229.1314 | 134822127 | - | - | - | - | - | - |
| Butyrylcarnitine | C11H21NO4 | 231.1471 | 213144 | 25576-40-3 | C02862 | HMDB0002013 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| cAMP | C10H12N5O6P | 329.0525 | 6076 | 60-92-4 | C00575 | HMDB0000058 | Nucleosides, nucleotides, and analogs | Purine nucleotides | Cyclic purine nucleotides |
| Carnitine | C7H15NO3 | 161.1052 | 10917 | 541-15-1 | C00318 | HMDB0000062 | Organic nitrogen compounds | Organonitrogen compounds | Quaternary ammonium salts |
| Carnosine | C9H14N4O3 | 226.1066 | 439224 | 305-84-0 | C00386 | HMDB0000033 | Organic acids and derivatives | Peptidomimetics | Hybrid peptides |
| CDP-choline | C14H26N4O11P2 | 488.1073 | 13804 | 987-78-0 | C00307 | HMDB0001413 | Nucleosides, nucleotides, and analogs | Pyrimidine nucleotides | Pyrimidine ribonucleotides |
| CDP-ethanolamine | C11H20N4O11P2 | 446.0604 | 123727 | 3036-18-8 | C00570 | HMDB0001564 | Nucleosides, nucleotides, and analogs | Pyrimidine nucleotides | Pyrimidine ribonucleotides |
| cGMP | C10H12N5O7P | 345.0474 | 135398570 | 7665-99-8 | C00942 | HMDB0001314 | Nucleosides, nucleotides, and analogs | Purine nucleotides | Cyclic purine nucleotides |
| Chenodeoxycholic acid | C24H40O4 | 392.2927 | 10133 | 474-25-9 | C02528 | HMDB0000518 | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives |
| Cholesterol sulfate | C27H46O4S | 466.3117 | 65076 | 1256-86-6 | C18043 | HMDB0000653 | Lipids and lipid-like molecules | Steroids and steroid derivatives | Cholestane steroids |
| Cholic acid | C24H40O5 | 408.2876 | 221493 | 81-25-4 | C00695 | HMDB0000619 | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives |
| Choline | C5H14NO | 104.1075 | 305 | 62-49-7 | C00114 | HMDB0000097 | Organic nitrogen compounds | Organonitrogen compounds | Quaternary ammonium salts |
| Citraconic acid | C5H6O4 | 130.0266 | 643798 | 498-23-7 | C02226 | HMDB0000634 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| Citramalic acid | C5H8O5 | 148.0372 | 1081 | 597-44-4 | C00815 | HMDB0000426 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| Citric acid | C6H8O7 | 192.0270 | 311 | 77-92-9 | C00158 | HMDB0000094 | Organic acids and derivatives | Carboxylic acids and derivatives | Tricarboxylic acids and derivatives |
| Citrulline | C6H13N3O3 | 175.0957 | 9750 | 372-75-8 | C00327 | HMDB0000904 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| CMPF | C12H16O5 | 240.0998 | 123979 | 86879-39-2 | - | HMDB0061112 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| Creatine | C4H9N3O2 | 131.0695 | 586 | 57-00-1 | C00300 | HMDB0000064 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Creatinine | C4H7N3O | 113.0589 | 588 | 60-27-5 | C00791 | HMDB0000562 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Cyclic-di-GMP | C20H24N10O14P2 | 690.0949 | 135440063 | 61093-23-0 | C16463 | - | - | - | - |
| Cysteine sulfinic acid | C3H7NO4S | 153.0096 | 1549098 | 1115-65-7 | C00606 | HMDB0000996 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Cystine | C6H12N2O4S2 | 240.0239 | 67678 | 56-89-3 | C00491 | HMDB0000192 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Cytidine | C9H13N3O5 | 243.0855 | 6175 | 65-46-3 | C00475 | HMDB0000089 | Nucleosides, nucleotides, and analogs | Pyrimidine nucleosides | NA |
| Cytosine | C4H5N3O | 111.0433 | 597 | 71-30-7 | C00380 | HMDB0000630 | Organoheterocyclic compounds | Diazines | Pyrimidines and pyrimidine derivatives |
| Decadienoylcarnitine | C17H29NO4 | 311.2097 | 71464495 | 128305-29-3 | - | HMDB0013325 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Decanoylcarnitine | C17H33NO4 | 315.2410 | 10245190 | 1492-27-9 | C03299 | HMDB0000651 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| decatrienoylcarnitine | C17H27NO4 | 309.1940 | 71464493 | - | - | - | - | - | - |
| Decenoylcarnitine | C17H31NO4 | 313.2253 | 129628702 | - | - | HMDB0013205 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Deoxycholic acid | C24H40O4 | 392.2927 | 222528 | 83-44-3 | C04483 | HMDB0000626 | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives |
| Dihydroorotic acid | C5H6N2O4 | 158.0328 | 439216 | 5988-19-2 | C00337 | HMDB0003349 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Dodecanoylcarnitine | C19H37NO4 | 343.2723 | 168381 | 25518-54-1 | - | HMDB0002250 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Dodecenoylcarnitine | C19H35NO4 | 341.2566 | 129664620 | - | - | HMDB0013326 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Eicoseneoylcarnitine | C27H51NO4 | 453.3818 | 71464507 | - | - | - | - | - | - |
| Ethanolamine | C2H7NO | 61.0528 | 700 | 141-43-5 | C00189 | HMDB0000149 | Organic nitrogen compounds | Organonitrogen compounds | Amines |
| Ethylmalonic acid | C5H8O4 | 132.0423 | 11756 | 601-75-2 | - | HMDB0000622 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| FAD | C27H33N9O15P2 | 785.1571 | 643975 | 146-14-5 | C00016 | HMDB0001248 | Nucleosides, nucleotides, and analogs | Flavin nucleotides | NA |
| Fumaric acid | C4H4O4 | 116.0110 | 444972 | 110-17-8 | C00122 | HMDB0000134 | Organic acids and derivatives | Carboxylic acids and derivatives | Dicarboxylic acids and derivatives |
| Gamma-glutamylvaline | C10H18N2O5 | 246.1216 | 7015683 | 2746-34-1 | - | HMDB0011172 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Glucosamine | C6H13NO5 | 179.0794 | 439213 | 3416-24-8 | C00329 | HMDB0001514 | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates |
| Glutamic_acid | C5H9NO4 | 147.0532 | 33032 | 56-86-0 | C00025 | HMDB0000148 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Glutamine | C5H10N2O3 | 146.0691 | 5961 | 56-85-9 | C00064 | HMDB0000641 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Glutaric_acid | C5H8O4 | 132.0423 | 743 | 110-94-1 | C00489 | HMDB0000661 | Organic acids and derivatives | Carboxylic acids and derivatives | Dicarboxylic acids and derivatives |
| Glutarylcarnitine | C12H21NO6 | 275.1369 | 53481699 | 102636-82-8 | - | HMDB0013130 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Glutathione_disulfide | C20H32N6O12S2 | 612.1520 | 65359 | 27025-41-8 | C00127 | HMDB0003337 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Glyceric acid | C3H6O4 | 106.0266 | 752 | 473-81-4 | C00258 | HMDB0000139 | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates |
| Glycerophosphocholine | C8H20NO6P | 257.1028 | 657272 | 28319-77-9 | C00670 | HMDB0000086 | Lipids and lipid-like molecules | Glycerophospholipids | Glycerophosphocholines |
| Glycine | C2H5NO2 | 75.0320 | 750 | 56-40-6 | C00037 | HMDB0000123 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Guanidinoacetic acid | C3H7N3O2 | 117.0538 | 763 | 352-97-6 | C00581 | HMDB0000128 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Guanine | C5H5N5O | 151.0494 | 135398634 | 73-40-5 | C00242 | HMDB0000132 | Organoheterocyclic compounds | Imidazopyrimidines | Purines and purine derivatives |
| Guanosine | C10H13N5O5 | 283.0917 | 135398635 | 118-00-3 | C00387 | HMDB0000133 | Nucleosides, nucleotides, and analogs | Purine nucleosides | NA |
| Heptanoylcarnitine_glutaconylcarnitine | C12H19NO6 | 273.1212 | 91825718 | - | - | HMDB0013129 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Hexadecadienoylcarnitine | C23H41NO4 | 395.3036 | 53481687 | 1911579-97-9 | - | HMDB0013334 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Hexanoylcarnitine | C13H25NO4 | 259.1784 | 3246938 | 22671-29-0 | - | HMDB0000756 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Hexenoylcarnitine | C13H23NO4 | 257.1627 | 129846791 | - | - | HMDB0013161 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Histamine | C5H9N3 | 111.0796 | 774 | 51-45-6 | C00388 | HMDB0000870 | Organic nitrogen compounds | Organonitrogen compounds | Amines |
| Histidine | C6H9N3O2 | 155.0695 | 6274 | 71-00-1 | C00135 | HMDB0000177 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Histidinol | C6H11N3O | 141.0902 | 776 | 501-28-0 | C00860 | HMDB0003431 | Organic nitrogen compounds | Organonitrogen compounds | Amines |
| Homoarginine | C7H16N4O2 | 188.1273 | 9085 | 156-86-5 | C01924 | HMDB0000670 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Homocitrulline | C7H15N3O3 | 189.1113 | 65072 | 1190-49-4 | C02427 | HMDB0000679 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Homocysteic_acid | C4H9NO5S | 183.0201 | 177491 | 14857-77-3 | C16511 | HMDB0002205 | Organic acids and derivatives | Carboxylic acids and derivatives | Direct Parent |
| Homoserine | C4H9NO3 | 119.0582 | 12647 | 672-15-1 | C00263 | HMDB0000719 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Hydroxybutyrylcarnitine | C11H21NO5 | 247.1420 | - | 1469900-92-2 | - | HMDB0013127 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Hydroxydecanoylcarnitine | C17H33NO5 | 331.2359 | 129691748 | - | - | - | - | - | - |
| Hydroxydodecenoylcarnitine | C19H35NO5 | 357.2515 | 71464579 | - | - | - | - | - | - |
| Hydroxyisovalerylcarnitine | C12H23NO5 | 261.1576 | 53915061 | 99159-87-2 | - | HMDB0061189 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Hydroxylysine | C6H14N2O3 | 162.1004 | 3032849 | 1190-94-9 | C16741 | HMDB0000450 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Hydroxyoctenoylcarnitine | C15H27NO5 | 301.1889 | - | - | - | - | - | - | - |
| Hydroxypalmitoylcarnitine | C23H45NO5 | 415.3298 | 126456228 | 195207-76-2 | - | HMDB0013336 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Hydroxyproline | C5H9NO3 | 131.0582 | 5810 | 51-35-4 | C01157 | HMDB0000725 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Hydroxytetradecenoylcarnitine | C21H39NO5 | 385.2828 | 129849063 | - | - | HMDB0013330 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Hydroxytryptophan | C11H12N2O3 | 220.0848 | 439280 | 08-09-4350 | C00643 | HMDB0000472 | Organoheterocyclic compounds | Indoles and derivatives | Tryptamines and derivatives |
| Hypotaurine | C2H7NO2S | 109.0198 | 107812 | 300-84-5 | C00519 | HMDB0000965 | Organic acids and derivatives | Sulfinic acids and derivatives | Sulfinic acids |
| Hypoxanthine | C5H4N4O | 136.0385 | 135398638 | 68-94-0 | C00262 | HMDB0000157 | Organoheterocyclic compounds | Imidazopyrimidines | Purines and purine derivatives |
| Imidazole | C3H4N2 | 68.0374 | 795 | 288-32-4 | C01589 | HMDB0001525 | Organoheterocyclic compounds | Azoles | Imidazoles |
| Imidazole-4-acetic acid | C5H6N2O2 | 126.0429 | 96215 | 645-65-8 | C02835 | HMDB0002024 | Organoheterocyclic compounds | Azoles | Imidazoles |
| Indole-3-carboxylic acid | C9H7NO2 | 161.0477 | 96215 | 645-65-8 | C02835 | HMDB0002024 | Organoheterocyclic compounds | Azoles | Imidazoles |
| Inosine | C10H12N4O5 | 268.0808 | 135398641 | 58-63-9 | C00294 | HMDB0000195 | Nucleosides, nucleotides, and analogs | Purine nucleosides | NA |
| Isocitric acid | C6H8O7 | 192.0270 | 1198 | 320-77-4 | C00311 | HMDB0000193 | Organic acids and derivatives | Carboxylic acids and derivatives | Tricarboxylic acids and derivatives |
| Isoleucine | C6H13NO2 | 131.0946 | 6306 | 73-32-5 | C00407 | HMDB0000172 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Isovalerylcarnitine | C12H23NO4 | 245.1627 | 6426851 | 31023-24-2 | C20826 | HMDB0000688 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Itaconic acid | C5H6O4 | 130.0266 | 811 | 97-65-4 | C00490 | HMDB0002092 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| Ketoleucine | C6H10O3 | 130.0630 | 70 | 816-66-0 | C00233 | HMDB0000695 | Organic acids and derivatives | Keto acids and derivatives | Short-chain keto acids and derivatives |
| Kynurenic acid | C10H7NO3 | 189.0426 | 3845 | 492-27-3 | C01717 | HMDB0000715 | Organoheterocyclic compounds | Quinolines and derivatives | Quinoline carboxylic acids |
| Kynurenine | C10H12N2O3 | 208.0848 | 161166 | 2922-83-0 | C00328 | HMDB0000684 | Organic oxygen compounds | Organooxygen compounds | Carbonyl compounds |
| Lactic acid | C3H6O3 | 90.0317 | 612 | 79-33-4 | C00186 | HMDB0000190 | Organic acids and derivatives | Hydroxy acids and derivatives | Alpha hydroxy acids and derivatives |
| Leucine | C6H13NO2 | 131.0946 | 6106 | 61-90-5 | C00123 | HMDB0000687 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Linoleoylcarnitine | C25H45NO4 | 423.3349 | 6450015 | 36816-10-1 | - | HMDB0006469 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Lipoic acid | C8H14O2S2 | 206.0435 | 6112 | 1200-22-2 | C16241 | HMDB0001451 | Organoheterocyclic compounds | Dithiolanes | Lipoic acids and derivatives |
| Lithocholic acid | C24H40O3 | 376.2977 | 9903 | 434-13-9 | C03990 | HMDB0000761 | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives |
| Lysine | C6H14N2O2 | 146.1055 | 5962 | 56-87-1 | C00047 | HMDB0000182 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Maleic acid | C4H4O4 | 116.0110 | 444266 | 110-16-7 | C01384 | HMDB0000176 | Organic acids and derivatives | Carboxylic acids and derivatives | Dicarboxylic acids and derivatives |
| Malic acid | C4H6O5 | 134.0215 | 222656 | 97-67-6 | C00149 | HMDB0000744 | Organic acids and derivatives | Hydroxy acids and derivatives | Beta hydroxy acids and derivatives |
| Malonylcarnitine | C10H17NO6 | 247.1056 | 91825606 | 910825-21-7 | - | HMDB0002095 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Methionine | C5H11NO2S | 149.0511 | 6137 | 63-68-3 | C00073 | HMDB0000696 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Methionine_sulfoxide | C5H11NO3S | 165.0460 | 158980 | 3226-65-1 | C02989 | HMDB0002005 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Methylimidazole acetic acid | C6H8N2O2 | 140.0586 | 75810 | 2625-49-2 | C05828 | HMDB0002820 | Organoheterocyclic compounds | Azoles | Imidazoles |
| Methylmalonic acid | C4H6O4 | 118.0266 | 487 | 516-05-2 | C02170 | HMDB0000202 | Organic acids and derivatives | Carboxylic acids and derivatives | Dicarboxylic acids and derivatives |
| Methylmalonylcarnitine | C11H19NO6 | 261.1212 | - | 256928-70-8 | - | HMDB0013133 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Methylsuccinic acid | C5H8O4 | 132.0423 | 10349 | 498-21-5 | - | HMDB0001844 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| Mevalonic_acid | C6H12O4 | 148.0736 | 449 | 150-97-0 | C00418 | HMDB0000227 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates |
| Myristoylcarnitine | C21H41NO4 | 371.3036 | 53477791 | 25597-07-3 | - | HMDB0005066 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| N-acetylalanine | C5H9NO3 | 131.0582 | 88064 | 97-69-8 | - | HMDB0000766 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylaspartic_acid | C6H9NO5 | 175.0481 | 65065 | 997-55-7 | C01042 | HMDB0000812 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylaspartylglutamic_acid | C11H16N2O8 | 304.0907 | - | 3106-85-2 | C12270 | HMDB0001067 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylglucosamine | C8H15NO6 | 221.0899 | 24139 | 14131-68-1 | C03878 | HMDB0000803 | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates |
| N-acetylglutamic_acid | C7H11NO5 | 189.0637 | 70914 | 1188-37-0 | C00624 | HMDB0001138 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylglycine | C4H7NO3 | 117.0426 | 10972 | 543-24-8 | - | HMDB0000532 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylisoleucine | C8H15NO3 | 173.1052 | 7036275 | 3077-46-1 | - | HMDB0061684 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetyl-L-citrulline | C8H15N3O4 | 217.1063 | 656979 | 33965-42-3 | C15532 | HMDB0000856 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetyl-L-cysteine | C5H9NO3S | 163.0303 | 12035 | 616-91-1 | C06809 | HMDB0001890 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylleucine | C8H15NO3 | 173.1052 | 70912 | 1188-21-2 | C02710 | HMDB0011756 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetyl-L-glutamine | C7H12N2O4 | 188.0797 | 182230 | 2490-97-3 | - | HMDB0006029 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetyl-L-histidine | C8H11N3O3 | 197.0800 | 75619 | 01-02-2497 | C02997 | HMDB0032055 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetyl-L-ornithine | C7H14N2O3 | 174.1004 | 439232 | 6205-08-9 | C00437 | HMDB0003357 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylmethionine | C7H13NO3S | 191.0616 | 448580 | 65-82-7 | C02712 | HMDB0011745 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylphenylalanine | C11H13NO3 | 207.0895 | 74839 | 2018-61-3 | C03519 | HMDB0000512 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylproline | C7H11NO3 | 157.0739 | 66141 | 68-95-1 | - | HMDB0094701 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylputrescine | C6H14N2O | 130.1106 | 122356 | 5699-41-2 | C02714 | HMDB0002064 | Organic nitrogen compounds | Organonitrogen compounds | Amines |
| N-acetylserine | C5H9NO4 | 147.0532 | 65249 | 16354-58-8 | - | HMDB0002931 | Organic acids and derivatives | - | - |
| N-acetylthreonine | C6H11NO4 | 161.0688 | 152204 | 17093-74-2 | - | HMDB0062557 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetyltryptophan | C13H14N2O3 | 246.1004 | 700653 | 1218-34-4 | - | HMDB0013713 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetyltyrosine | C11H13NO4 | 223.0845 | 68310 | 537-55-3 | - | HMDB0000866 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-acetylvaline | C7H13NO3 | 159.0895 | 66789 | 96-81-1 | - | HMDB0011757 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Nalpha-acetyl-L-arginine | C8H16N4O3 | 216.1222 | 67427 | 155-84-0 | - | HMDB0004620 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Nalpha-acetyllysine | C8H16N2O3 | 188.1161 | 92907 | 1946-82-3 | C12989 | HMDB0000446 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-butyrylglycine | C6H11NO3 | 145.0739 | 88412 | 20208-73-5 | - | HMDB0000808 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-caprylylglycine | C10H19NO3 | 201.1365 | 84290 | 14246-53-8 | - | HMDB0000832 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Nepsilon-acetyllysine | C8H16N2O3 | 188.1161 | 92832 | 692-04-6 | C02727 | HMDB0000206 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-formylkynurenine | C11H12N2O4 | 236.0797 | 439788 | 08-11-3978 | C02700 | HMDB0001200 | Organic oxygen compounds | Organooxygen compounds | Carbonyl compounds |
| N-furoylglycine | C7H7NO4 | 169.0375 | 21863 | 5657-19-2 | - | HMDB0000439 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Nicotinamide | C6H6N2O | 122.0480 | 936 | 98-92-0 | C00153 | HMDB0001406 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridinecarboxylic acids and derivatives |
| Nicotinic acid | C6H5NO2 | 123.0320 | 938 | 59-67-6 | C00253 | HMDB0001488 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridinecarboxylic acids and derivatives |
| N-methylaspartic acid | C5H9NO4 | 147.0531 | 22880 | 6384-92-5 | C12269 | HMDB0002393 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-myristoylglycine | C16H31NO3 | 285.2304 | 72348 | 14246-55-0 | - | HMDB0013250 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| NN-dimethylglycine | C4H9NO2 | 103.0633 | 673 | 1118-68-9 | C01026 | HMDB0000092 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-oleoylglycine | C20H37NO3 | 339.2773 | 6436908 | 2601-90-3 | - | HMDB0013631 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-palmitoylglycine | C18H35NO3 | 313.2617 | 151008 | 158305-64-7 | - | HMDB0013034 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| N-propionylglycine | C5H9NO3 | 131.0582 | 98681 | 21709-90-0 | - | HMDB0000783 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Octadecanoylcarnitine | C25H49NO4 | 427.3662 | 52922056 | 25597-09-5 | - | HMDB0000848 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Octanoylcarnitine | C15H29NO4 | 287.2097 | 11953814 | 25243-95-2 | C02838 | HMDB0000791 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Octenoylcarnitine | C15H27NO4 | 285.1940 | 129692230 | - | - | HMDB0013324 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Oleoyl L-carnitine | C25H47NO4 | 425.3505 | 46907933 | 38677-66-6 | - | HMDB0005065 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| O-phosphotyrosine | C9H12NO6P | 261.0402 | 30819 | 21820-51-9 | C06501 | HMDB0006049 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Ornithine | C5H12N2O2 | 132.0899 | 6262 | 70-26-8 | C00077 | HMDB0000214 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Palmitoleoylcarnitine | C23H43NO4 | 397.3192 | 71464547 | 329321-94-0 | - | HMDB0013207 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Palmityol-L-carnitine | C23H45NO4 | 399.3349 | 11953816 | 2364-67-2 | C02990 | HMDB0000222 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Pantothenic acid | C9H17NO5 | 219.1107 | 6613 | 79-83-4 | C00864 | HMDB0000210 | Organic oxygen compounds | Organooxygen compounds | Alcohols and polyols |
| Phenylacetylglutamine | C13H16N2O4 | 264.1110 | 92258 | 28047-15-6 | C04148 | HMDB0006344 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Phenylalanine | C9H11NO2 | 165.0790 | 6140 | 63-91-2 | C00079 | HMDB0000159 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Phenylpyruvic acid | C9H8O3 | 164.0473 | 997 | 156-06-9 | C00166 | HMDB0000205 | Benzenoids | Benzene and substituted derivatives | Phenylpyruvic acid derivatives |
| Phosphoenolpyruvic acid | C3H5O6P | 167.9824 | 1005 | 138-08-9 | C00074 | HMDB0000263 | Organic acids and derivatives | Organic phosphoric acids and derivatives | Phosphate esters |
| Picolinic acid | C6H5NO2 | 123.0320 | 1018 | 98-98-6 | C10164 | HMDB0002243 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridines and derivatives |
| Pipecolic_acid | C6H11NO2 | 129.0790 | 849 | 535-75-1 | C00408 | HMDB0000070 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Pivaloylglycine | C7H13NO3 | 159.0895 | 2608784 | 23891-96-5 | - | - | - | - | - |
| Proline | C5H9NO2 | 115.0633 | 145742 | 147-85-3 | C00148 | HMDB0000162 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Propionylcarnitine | C10H19NO4 | 217.1314 | 188824 | 20064-19-1 | C03017 | HMDB0000824 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Purine | C5H4N4 | 120.0436 | 1044 | 120-73-0 | C15587 | HMDB0001366 | Organoheterocyclic compounds | Imidazopyrimidines | Purines and purine derivatives |
| Putrescine | C4H12N2 | 88.1000 | 1045 | 111-60-1 | C00134 | HMDB0001414 | Organic nitrogen compounds | Organonitrogen compounds | Amines |
| Pyridoxamine | C8H12N2O2 | 168.0899 | 1052 | 85-87-0 | C00534 | HMDB0001431 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridoxamines |
| Pyridoxine | C8H11NO3 | 169.0739 | 1054 | 65-23-6 | C00314 | HMDB0000239 | Organoheterocyclic compounds | Pyridines and derivatives | Pyridoxines |
| Pyroglutamic_acid | C5H7NO3 | 129.0426 | 7405 | 98-79-3 | C01879 | HMDB0000267 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Pyruvic acid | C3H4O3 | 88.0160 | 1060 | 127-17-3 | C00022 | HMDB0000243 | Organic acids and derivatives | Keto acids and derivatives | Alpha-keto acids and derivatives |
| Riboflavin | C17H20N4O6 | 376.1383 | 493570 | 83-88-5 | C00255 | HMDB0000244 | Organoheterocyclic compounds | Pteridines and derivatives | Alloxazines and isoalloxazines |
| S-adenosyl-L-homocysteine | C14H20N6O5S | 384.1216 | 439155 | 979-92-0 | C00021 | HMDB0000939 | Nucleosides, nucleotides, and analogs | 5′-deoxyribonucleosides | 5′-deoxy-5′-thionucleosides |
| S-adenosyl-L-methionine | C15H22N6O5S | 398.1451 | 34755 | 485-80-3 | C00019 | HMDB0001185 | Nucleosides, nucleotides, and analogs | 5′-deoxyribonucleosides | 5′-deoxy-5′-thionucleosides |
| Sarcosine | C3H7NO2 | 89.0477 | 1088 | 107-97-1 | C00213 | HMDB0000271 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Symmetric dimethyl arginine | C8H18N4O2 | 202.1430 | 169148 | 30344-00-4 | - | HMDB0003334 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Serine | C3H7NO3 | 105.0426 | 5951 | 56-45-1 | C00065 | HMDB0000187 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Shikimic_acid | C7H10O5 | 174.0528 | 8742 | 138-59-0 | C00493 | HMDB0003070 | Organic oxygen compounds | Organooxygen compounds | Alcohols and polyols |
| S-methylcysteine | C4H9NO2S | 135.0354 | 24417 | 1187-84-4 | C22040 | HMDB0002108 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| S-methylcysteine_sulfoxide | C4H9NO3S | 151.0.0303 | 99483 | 6853-87-8 | - | HMDB0029432 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| S-methylglutathione | C11H19N3O6S | 321.0995 | 115260 | 2922-56-7 | C11347 | - | - | - | - |
| S-methylthioadenosine | C11H15N5O3S | 297.0896 | 439176 | 2457-80-9 | C00170 | HMDB0001173 | Nucleosides, nucleotides, and analogs | 5′-deoxyribonucleosides | 5′-deoxy-5′-thionucleosides |
| Succinic acid | C4H6O4 | 118.0266 | 1110 | 110-15-6 | C00042 | HMDB0000254 | Organic acids and derivatives | Carboxylic acids and derivatives | Dicarboxylic acids and derivatives |
| Succinoadenosine | C14H17N5O8 | 383.1077 | 20849086 | 4542-23-8 | - | HMDB0000912 | Nucleosides, nucleotides, and analogs | Purine nucleosides | NA |
| Succinylcarnitine | C11H19NO6 | 261.1212 | 131802075 | 256928-74-2 | - | HMDB0061717 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Taurine | C2H7NO3S | 125.0147 | 1123 | 107-35-7 | C00245 | HMDB0000251 | Organic acids and derivatives | Organic sulfonic acids and derivatives | Organosulfonic acids and derivatives |
| Tetradecadienoylcarnitine | C21H37NO4 | 367.2723 | 129691756 | - | - | HMDB0013331 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Tetradecenoylcarnitine | C21H39NO4 | 369.2879 | 129631631 | 835598-21-5 | - | HMDB0002014 | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters |
| Thiamine | C12H17N4OS+ | 265.1123 | 1130 | 70-16-6 | C00378 | HMDB0000235 | Organoheterocyclic compounds | Diazines | Pyrimidines and pyrimidine derivatives |
| Threonine | C4H9NO3 | 119.0582 | 6288 | 72-19-5 | C00188 | HMDB0000167 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Thymidine | C10H14N2O5 | 242.0903 | 5789 | 50-89-5 | C00214 | HMDB0000273 | Nucleosides, nucleotides, and analogs | Pyrimidine nucleosides | Pyrimidine 2′-deoxyribonucleosides |
| Thymine | C5H6N2O2 | 126.0429 | 1135 | 65-71-4 | C00178 | HMDB0000262 | Organoheterocyclic compounds | Diazines | Pyrimidines and pyrimidine derivatives |
| Trans-aconitic acid | C6H6O6 | 174.0164 | 444212 | 4023-65-8 | C02341 | HMDB0000958 | Organic acids and derivatives | Carboxylic acids and derivatives | Tricarboxylic acids and derivatives |
| Trimethylamine_N-oxide | C3H9NO | 75.0684 | 1145 | 1184-78-7 | C01104 | HMDB0000925 | Organic nitrogen compounds | Organonitrogen compounds | Aminoxides |
| Tryptophan | C11H12N2O2 | 204.0899 | 6305 | 73-22-3 | C00078 | HMDB0000929 | Organoheterocyclic compounds | Indoles and derivatives | Indoles and derivatives |
| Tyrosine | C9H11NO3 | 181.0739 | 6057 | 60-18-4 | C00082 | HMDB0000158 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| UDP-GlcNac | C17H27N3O17P2 | 607.0816 | 10705 | 528-04-1 | C00043 | HMDB0000290 | Nucleosides, nucleotides, and analogs | Pyrimidine nucleotides | Pyrimidine nucleotide sugars |
| Uracil | C4H4N2O2 | 112.0273 | 1174 | 66-22-8 | C00106 | HMDB0000300 | Organoheterocyclic compounds | Diazines | Pyrimidines and pyrimidine derivatives |
| Urea | CH4N2O | 60.0324 | 1176 | 57-13-6 | C00086 | HMDB0000294 | Organic acids and derivatives | Organic carbonic acids and derivatives | Ureas |
| Uric acid | C5H4N4O3 | 168.0283 | 1175 | 69-93-2 | C00366 | HMDB0000289 | Organoheterocyclic compounds | Imidazopyrimidines | Purines and purine derivatives |
| Uridine | C9H12N2O6 | 244.0695 | 6029 | 58-96-8 | C00299 | HMDB0000296 | Nucleosides, nucleotides, and analogs | Pyrimidine nucleosides | NA |
| Ursodeoxycholic acid | C24H40O4 | 392.2927 | 31401 | 128-13-2 | C07880 | HMDB0000946 | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives |
| Valine | C5H11NO2 | 117.0790 | 6287 | 72-18-4 | C00183 | HMDB0000883 | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogs |
| Xanthine | C5H4N4O2 | 152.0334 | 1188 | 69-89-6 | C00385 | HMDB0000292 | Organoheterocyclic compounds | Imidazopyrimidines | Purines and purine derivatives |
| Xanthosine | C10H12N4O6 | 284.0757 | 64959 | 146-80-5 | C01762 | HMDB0000299 | Nucleosides, nucleotides, and analogs | Purine nucleosides | NA |
| Xanthurenic acid | C10H7NO4 | 205.0375 | 5699 | 59-00-7 | C02470 | HMDB0000881 | Organoheterocyclic compounds | Quinolines and derivatives | Quinoline carboxylic acids |