| Label | Id | |
|---|---|---|
| cis-beta-farnesene | 39242 | |
| cis-bisulepin | 167624 | |
| cis-parinarate | 32414 | |
| citrullines | 23324 | |
| cobalt-precorrin-5A | 52488 | |
| cobalt-precorrin-5B | 52489 | |
| cobalt-precorrin-7 | 52490 | |
| cobalt-sirohydrochlorin | 52491 | |
| coelichelin(3-) | 84724 | |
| columbianadin | 132624 | |
| creatinate | 66924 | |
| cryptomaldamide | 156424 | |
| cucurbitadienol | 62456 | |
| cucurbitane | 73245 | |
| cyanides | 23424 |