dimethyl 4-hydroxy-5-oxocyclohexane-1,2-dicarboxylate

2-oxo-1,2,3,4-tetrahydroquinoline-4-carboxylic acid methyl ester

methyl 2-(2-oxo-1,3-dihydroindol-3-yl)acetate

3,5-diphenyl-1,2,4-thiadiazole

3-Phenyl-4,5-isothiazoldicarbonsaeure-dimethylester