methyl 1-(4'-chlorobenzoyl)-6-methyl-4-oxo-1,4-dihydroquinoline-2-carboxylate
methyl 1-(4'-methylbenzoyl)-6-methyl-4-oxo-1,4-dihydroquinoline-2-carboxylate
methyl 1-benzoyl-6-methyl-4-oxo-1,4-dihydro-quinoline-2-carboxylate
methyl 1-(4'-fluorobenzoyl)-6-methyl-4-oxo-1,4-dihydroquinoline-2-carboxylate