N-(5,5-dimethyl-3-oxocyclohex-1-enyl)-2-methyl-β-alanine methyl ester

1,3-bis(5,5-dimethyl-3-oxocyclohex-1-enamino)-2-methylpropan-1-one

3,3-dimethyl-2,4-dihydrophenanthridine-1,7,10-trione

3,3,6-trimethyl-2,4-dihydrophenanthridine-1,7,10-trione

2-[(4-bromophenyl)methylidene]indene-1,3-dione