3-acetylpent-2-ene-1,4-dione 1-(2,4-dinitrophenylhydrazone)
3-acetyl-4-(1-acetyl-2-oxopropyl)-1-(2,4-dinitrophenylamino)-2-methylpyrrole
6,6-dimethyl-3-(4,4-dimethyl-2,6-dioxocyclohexyl)-1-(2,4-dinitrophenylamino)-4-oxo-4,5,6,7-tetrahydroindole
bis(4,4-dimethyl-2,6-dioxocyclohexyl)acetaldehyde 2,4-dinitrophenylhydrazone
4-chloro-1-(2,4-dinitrophenyl)-6-ethoxy-1,4,5,6-tetrahydropyridazine