| # | Metabolite | ID | PubChem CID | HMDB ID | KEGG ID | ChEBI ID | Molecular formula |
|---|---|---|---|---|---|---|---|
| 181 | Unknown_D_1.397 | 143 | N/A | N/A | N/A | N/A | N/A |
| 182 | Uracil | 68 | 1174 | HMDB0000300 | N/A | N/A | C4H4N2O2 |
| 183 | Uric acid | 93 | 1175 | HMDB0000289 | N/A | N/A | C5H4N4O3 |
| 184 | Uridine | 67 | 6029 | HMDB0000296 | N/A | N/A | C9H12N2O6 |
| 185 | Uridine diphosphate-N-acetylglucosamine | 156 | 10705 | HMDB0000304 | N/A | N/A | C17H27N3O17P2 |
| 186 | UTP | 98 | 6133 | HMDB0000285 | N/A | N/A | C9H15N2O15P3 |
| 187 | Valine | 16 | 6287 | HMDB0000883 | C00183 | 16414 | C5H11NO2 |
| 188 | Xanthine | 79 | 1188 | HMDB0000292 | N/A | N/A | C5H4N4O2 |
| 189 | Xanthosine | 199 | 64959 | HMDB0000299 | N/A | N/A | C10H12N4O6 |