| Label | Id | |
|---|---|---|
| Concerta | 31836 | |
| Contomin | 3647 | |
| Cp(-) | 36767 | |
| CpUpUpIpGpCpm(1)IpUpGpCpGp | 76363 | |
| Cr(Pic)3 | 50369 | |
| CrPic | 50369 | |
| Crotonyl-CoA | 36926 | |
| Cu(2+) | 29036 | |
| Cu(II) | 29036 | |
| Cu(NO3)2 | 78036 | |
| Cu2+ | 29036 | |
| Cx-SAM | 136699 | |
| Cyanatsalz | 36831 | |
| Cyanatsalze | 36831 | |
| Cyclohexancarbonsaeure | 36096 |