7-(Diethylamino)-2-oxo-2H-chromene-3-carbaldehyde
1,3-Dimethyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid
Methyl 5-chloro-2-oxo-1,2-dihydropyridine-3-carboxylate
5-Bromo-4,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carbonitrile
6,8-Dibromo-2-oxo-2H-chromene-3-carboxylic acid
Methyl 6-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate