Table 2. Metabolites Annotated in Synovial Fluid by Chenomx, Metabolites Subsequently Identified Using in-House Library Are Indicated by Metabolomics Standards Initiative (MSI) Level 1.29.
| database identifier | metabolite identification | reliability |
|---|---|---|
| HMDB00001 | 1-Methylhistidine | MS Level 2 |
| HMDB59655 | 2-Hydroxyglutarate | MS Level 2 |
| HMDB11743 | 2-Phenylpropionate | MS Level 2 |
| HMDB00357 | 3-Hydroxybutyrate | MS Level 2 |
| HMDB00355 | 3-Hydroxymethylglutarate | MS Level 2 |
| HMDB01149 | 5-Aminolevulinate | MS Level 2 |
| HMDB00042 | Acetate | MS Level 1 |
| HMDB00060 | Acetoacetate | MS Level 2 |
| HMDB01890 | Acetylcysteine | MS Level 2 |
| HMDB01432 | Agmatine | MS Level 2 |
| HMDB00729 | Alpha-Hydroxyisobutyrate | MS Level 2 |
| HMDB00186 | Alpha-Lactose | MS Level 2 |
| HMDB00043 | Betaine | MS Level 1 |
| HMDB00030 | Biotin | MS Level 1 |
| HMDB00094 | Citrate | MS Level 1 |
| HMDB00064 | Creatine | MS Level 1 |
| HMDB00562 | Creatinine | MS Level 1 |
| HMDB00143 | d-Galactose | MS Level 2 |
| HMDB00122 | d-Glucose | MS Level 1 |
| HMDB00108 | Ethanol | MS Level 1 |
| HMDB00142 | Formate | MS Level 2 |
| HMDB00663 | Glucarate | MS Level 2 |
| HMDB01401 | Glucose 6-phosphate | MS Level 2 |
| HMDB00131 | Glycerol | MS Level 1 |
| HMDB00123 | Glycine | MS Level 1 |
| HMDB00721 | Glycylproline | MS Level 2 |
| HMDB00128 | Guanidoacetate | MS Level 2 |
| HMDB00870 | Histamine | MS Level 2 |
| HMDB00764 | Hydrocinnamate | MS Level 2 |
| HMDB00678 | Isovalerylglycine | MS Level 2 |
| HMDB00190 | Lactate | MS Level 1 |
| HMDB00161 | l-Alanine | MS Level 1 |
| HMDB00646 | l-Arabinose | MS Level 2 |
| HMDB00062 | l-Carnitine | MS Level 2 |
| HMDB00174 | l-Fucose | MS Level 2 |
| HMDB00148 | l-Glutamate | MS Level 1 |
| HMDB00641 | l-Glutamine | MS Level 1 |
| HMDB00177 | l-Histidine | MS Level 1 |
| HMDB00687 | l-Leucine | MS Level 1 |
| HMDB00159 | l-Phenylalanine | MS Level 1 |
| HMDB00167 | l-Threonine | MS Level 2 |
| HMDB00158 | l-Tyrosine | MS Level 1 |
| HMDB00883 | l-Valine | MS Level 1 |
| HMDB01389 | Melatonin | MS Level 2 |
| HMDB01238 | N-Acetylserotonin | MS Level 2 |
| HMDB02055 | o-Cresol | MS Level 2 |
| HMDB00210 | Pantothenic acid | MS Level 2 |
| HMDB00821 | Phenylacetylglycine | MS Level 2 |
| HMDB01511 | Phosphocreatine | MS Level 2 |
| HMDB00239 | Pyridoxine | MS Level 2 |
| HMDB00243 | Pyruvate | MS Level 1 |
| HMDB00635 | Succinylacetone | MS Level 2 |
| HMDB00262 | Thymine | MS Level 1 |
| HMDB01878 | Thymol | MS Level 2 |
| HMDB00294 | Urea | MS Level 1 |