{4-Acetyl-6-oxo-3-phenyl-5-[(5-trifluoromethyl-benzothiazol-2-ylmethyl)-amino]-6H-pyridazin-1-yl}-acetic acid ethyl ester 在
sodium hydroxide 作用下,
以
乙醇 为溶剂,
以53%的产率得到[3-Methyl-7-oxo-4-phenyl-2-(5-trifluoromethyl-benzothiazol-2-yl)-1,7-dihydro-pyrrolo[2,3-d]pyridazin-6-yl]-acetic acid