| 2680-00-4 | ETHYLENE-D1 | C2H3D |
| 2680-40-2 | 6-(1-{2-[(1E)-1-(6-oxocyclohexa-2,4-dien-1-ylidene)propyl]hydrazino}propylidene)cyclohexa-2,4-dien-1-one | C18H20 N2 O2 |
| 2680-49-1 | Ethanone, 1-(4-butoxy-2-hydroxyphenyl)-, [1-(4-butoxy-2-hydroxyphenyl)ethylidene]hydrazone | C24H32N2O4 |
| 2680-66-2 | 2,7-dichlorophenazine 5-oxide | C12H6 Cl2 N2 O |