英文别名Pyrrolo[1,2-b]pyridazine-3-carboxylic acid, 1,4-dihydro-4-oxo-, ethyl ester; ethyl 4-oxo-1H,4H-pyrrolo[1,2-b]pyridazine-3-carboxylate; ethyl 4-hydroxypyrrolo[1,2-b]pyridazine-3-carboxylate; ethyl 4-oxo-1H-pyrrolo[1,2-b]pyridazine-3-carboxylate; ethyl 1,4-dihydro-4-oxopyrrolo[1,2-b]pyridazine-3-carboxylate; ethyl 4-oxo-1,4-dihydropyrrolo[1,2,b]pyridazin-3-carboxylate 
