英文别名ethyl 6-oxo-1H-pyridazine-5-carboxylate; ETHYL 3-OXO-2,3-DIHYDROPYRIDAZINE-4-CARBOXYLATE; 4-Pyridazinecarboxylic acid, 2,3-dihydro-3-oxo-, ethyl ester; 4-ethoxycarbonylpyridazin-3(2h)-one; ethyl 2,3-dihydro-3-oxopyridazine-4-carboxylate; 3-Oxo-2,3-dihydro-pyridazine-4-carboxylic acid ethyl ester 
