| Label | Id | |
|---|---|---|
| Cirsimarin | 192417 | |
| Cl-Amidine | 190024 | |
| Clavorubin | 224936 | |
| Closthioamide | 222433 | |
| Clotiapine | 31424 | |
| Coaristeromycin | 224535 | |
| CpU | 165824 | |
| Craniformin | 199724 | |
| Cristazine | 224510 | |
| Cryptophycin-40 | 224516 | |
| Cuculoquinone | 224987 | |
| Cyclamate | 82431 | |
| Cyclochlorotine | 82432 | |
| Cyclotine | 221242 | |
| Cys-Arg-Ile | 161124 |