. 2013 Sep 4;8(9):e73076. doi: 10.1371/journal.pone.0073076

Table 4. List of metabolites identified in human urine extracts by GC-MS (except volatile compounds).

Amino acids	HMDB ID	Organic acids	HMDB ID
Beta-Alanine^a	HMDB00056	Azelaic acid^b	HMDB00784
Glycine^a	HMDB00123	Benzoic acid^b	HMDB01870
L-Alanine^a	HMDB00161	Butyric acid^a	HMDB00039
L-Asparagine^a	HMDB00168	Cis-Aconitic acid^a,b	HMDB00072
L-Aspartic acid^a	HMDB00191	Citraconic acid^b	HMDB00634
L-Glutamine^a	HMDB00641	Citramalic acid^b	HMDB00426
L-Histidine^a	HMDB00177	Citric acid^a	HMDB00094
L-Isoleucine^a	HMDB00172	Erythronic acid^a	HMDB00613
L-Leucine^a	HMDB00687	Ethylmalonic acid^b	HMDB00622
L-Lysine^a	HMDB00182	Gluconic acid^a	HMDB00625
L-Ornithine^a	HMDB00214	Glutaric acid^b	HMDB00661
L-Phenylalanine^a	HMDB00159	Glyceric acid^a	HMDB00139
L-Serine^a	HMDB00187	Glycolic acid^a,b	HMDB00115
L-Threonine^a	HMDB00167	Glyoxalic acid^a	HMDB00119
L-Tryptophan^a	HMDB00929	Hippuric acid^a,b	HMDB00714
L-Tyrosine^a	HMDB00158	Homovanillic acid^b	HMDB00118
L-Valine^a	HMDB00883	HPHPA^b	HMDB02643
Bile acids	HMDB ID	Hydroxypropionic acid^b	HMDB00700
Cholenic acid^c	HMDB00308	Indoleacetic acid^b	HMDB00197
Deoxycholic acid^c	HMDB00626	Indolelactic acid ^b	HMDB00671
Lithocholic acid^c	HMDB00761	Isobutyrylglycine^b	HMDB00730
Ursodeoxycholic acid^c	HMDB00946	Isocitric acid^a	HMDB00193
Misc	HMDB ID	Isovalerylglycine^b	HMDB00678
3-Methylhistidine^a	HMDB00479	Kynurenic acid^b	HMDB00715
5-Hydroxyindole^b	HMDB59805	Levulinic acid^b	HMDB00720
Creatinine^a	HMDB00562	L-Lactic acid^b	HMDB00190
Dimethylglycine^a	HMDB00092	Malic acid^a	HMDB00744
D-Xylitol^a	HMDB02917	Malonic acid^a,b	HMDB00691
Glycerol 3-phosphate^a	HMDB00126	m-Chlorobenzoic acid^b	HMDB01544
Glycerol^a	HMDB00131	m-Coumaric acid^b	HMDB01713
Mannitol^a	HMDB00765	Methylmalonic acid^b	HMDB00202
Myoinositol^a	HMDB00211	Methylsuccinic acid^b	HMDB01844
Pseudouridine^a	HMDB00767	o-Hydroxyhippuric acid^b	HMDB00840
Scyllitol^a	HMDB06088	o-Hydroxyphenylacetic acid^b	HMDB00669
Sorbitol^a	HMDB00247	Oleic acid^b	HMDB00207
Urea^a	HMDB00294	Oxalic acid^a	HMDB02329
Organic acids	HMDB ID	Oxoglutaric acid^b	HMDB00208
2,4-Dihydroxybutanoic acid^a	HMDB00360	Palmitic acid^b	HMDB00220
2-Ethylhydracrylic acid^b	HMDB00396	Pantothenic acid^b	HMDB00210
2-Furoylglycine^b	HMDB00439	Phosphoric acid^b	HMDB02142
2-Hydroxy-2-methylbutyric acid^b	HMDB01987	p-Hydroxyphenylacetic acid^a	HMDB00020
2-Hydroxyglutaric acid^a	HMDB00694	Pimelic acid^b	HMDB00857
2-Hydroxyvaleric acid^a	HMDB01863	Pyroglutamic acid^a,b	HMDB00267
2-Ketobutyric acid^b	HMDB00005	Pyruvic acid^b	HMDB00243
2-Methyl-3-hydroxybutyric acid^b	HMDB00354	Quinolinic acid^b	HMDB00232
3,4-Dihydroxybenzeneacetic acid^b	HMDB01336	Stearic acid^b	HMDB00827
3,4-Dihydroxybutanoic acid^a,b	HMDB00337	Suberic acid^b	HMDB00893
3,4-Dihydroxyhydrocinnamic acid^b	HMDB00423	Succinic acid^a,b	HMDB00254
3-Aminoisobutanoic acid^a,b	HMDB03911	Sumiki’s acid^b	HMDB02432
3-Hydroxyhippuric acid^b	HMDB06116	Tartaric acid^a	HMDB00956
3-Hydroxyisobutyric acid^a	HMDB00023	Threonic acid^a	HMDB00943
3-Hydroxyisovaleric acid^a,b	HMDB00754	Trans-Aconitic acid^a	HMDB00958
3-Hydroxymethylglutaric acid^b	HMDB00355	Trans-Ferulic acid^b	HMDB00954
3-Hydroxyphenylacetic acid^b	HMDB00440	Uric acid^a	HMDB00289
3-Hydroxysebacic acid^b	HMDB00350	Vanillyllactic acid^b	HMDB00913
3-Methyladipic acid^b	HMDB00555	Vanillylmandelic acid^b	HMDB00291
3-Methylglutaconic acid^b	HMDB00522	Sugars	HMDB ID
4-Deoxythreonic acid^a,b	HMDB02453	D-Fructose^a	HMDB00660
4-Hydroxybenzoic acid^b	HMDB00500	D-Galactose^a	HMDB00143
4-Hydroxyphenyllactic acid^b	HMDB00755	D-Glucose^a	HMDB00122
5-Hydroxyhexanoic acid^b	HMDB00525	D-Xylose^a	HMDB00098
5-Hydroxyindoleacetic acid^b	HMDB00763	D-Xylulose^a	HMDB01644
Adipic acid^a,b	HMDB00448	L-Arabinose^a	HMDB00646
Alpha-Hydroxyisobutyric acid^b	HMDB00729	L-Fucose^a	HMDB00174
Aminomalonic acid^a	HMDB01147	Sucrose^a	HMDB00258
Ascorbic acid^a	HMDB00044

Polar metabolites.

Targeted organic acids.

Targeted bile acids. HPHPA: 3-(3-hydroxyphenyl)-3-hydroxypropanoic acid.