异烟酸乙酯

2-(2-hydroxyethyl)pyrrolo[3,4-c]pyridine-1,3-dione

2-[(4-oxo-3H-pyrido[3,4-d]pyridazin-1-yl)amino]ethyl acetate

2-[(1-oxo-2H-pyrido[3,4-d]pyridazin-4-yl)amino]ethyl acetate

dimethyl 1-oxidopyridin-1-ium-3,4-dicarboxylate