ethyl 2-(1-methyl-3-nitro-2-oxo-1,2-dihydropyridin-4-yl)-3-oxobutanoate
4-chloro-3-nitropyridin-2(1H)-one
4-chloro-1-methyl-3-nitropyridine-2(1H)-one
ethyl 2,6-dimethyl-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridine-3-carboxylate
(1-bromoethyl)benzne