1,3-Dimethyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid
2-Oxo-6-(trifluoromethyl)-1,2-dihydropyridine-4-carboxylic acid
7-(Diethylamino)-2-oxo-2H-chromene-3-carbaldehyde
2-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid
5-Chloro-6-(chloromethyl)pyrimidine-2,4(1H,3H)-dione