| Label | Id | |
|---|---|---|
| Crotalarin | 187371 | |
| Cryptocaryone | 184734 | |
| Cryptophycin-26 | 209273 | |
| Cuautepestalorin | 209733 | |
| Cuelure | 173583 | |
| Cumanin | 173423 | |
| Cumyluron | 81738 | |
| Curcumol | 173719 | |
| Curvopeptin-4 | 226573 | |
| Cyclo(Pro-Phe-Pro-Phe) | 198173 | |
| Cyclo-(D-Pipecolinyl-L-isoleucine) | 227333 | |
| Cycloalliin | 173815 | |
| Cycloclausenamide | 173985 | |
| Cyclomammeisin | 175373 | |
| Cyclopentanethiol | 173317 |