英文别名ethyl 6-chloro-3-oxo-2,3-dihydropyridazine-4-carboxylate; 4-Pyridazinecarboxylic acid, 6-chloro-2,3-dihydro-3-oxo-, ethyl ester; ethyl 3-chloro-6-oxo-1H-pyridazine-5-carboxylate; 4-Pyridazinecarboxylic acid, 6-chloro-3-hydroxy-, ethyl ester; Ethyl 6-chloro-3-hydroxy-4-pyridazinecarboxylate 
