| 2921-88-2 | Chlorpyrifos | C9H11Cl3NO3PS |
| 2921-92-8 | propylidynetrimethyl trinitrate | C6H11 N3 O9 |
| 2921-14-4 | Carboxymethoxylamine hemihydrochloride | 2(C2H5NO3).HCl |
| 2921-20-2 | Tetradecylthioacetic acid | C16H32O2S |
| 2921-13-3 | norcarnitine | C6H13 N O3 |
| 2921-31-5 | ENT 23,970 | C8H14 Cl O2 P S |
| 2921-38-2 | Urea,N-[bis(1-aziridinyl)phosphinyl]-N'-(3,4-dichlorophenyl)- | C11H13 Cl2 N4 O2 P |