3-[(2-chlorophenyl)hydrazinylidene]-6-oxocyclohexa-1,4-diene-1-carbaldehyde

2,3,4,4a-tetrahydroxanthen-1-one

(6E)-6-[(2,6-diethylanilino)methylidene]cyclohexa-2,4-dien-1-one

4-[[(E)-(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]amino]-N-pyrimidin-2-ylbenzenesulfonamide

4-methyl-2-(2-oxochromen-3-yl)chromeno[3,4-c]pyridin-5-one