4-{2-(2-carboxy-ethyl)-3-[6-(5-dimethylcarbamoyl-3',4'-difluoro-biphenyl-3-yloxy)-hexyl]-phenoxy}-butyric acid 、 4-[3-{6-[5-(2-Difluoromethoxy-benzylcarbamoyl)-bi phenyl-3-yloxy]-hexyl}-2-(2-ethoxycarbamoyl-ethyl)-phenoxy]-butyric acid ethyl ester 、
sodium hydroxide 在
4-[2-(2-carboxy-ethyl)-3-{6-[5-(2-difluoromethoxy-benzylcarbamoyl)-biphenyl-3-yloxy]-hexyl}-phenoxy]-butyric acid 作用下,
以
四氢呋喃 、
乙醇 为溶剂,
以to afford 4-(2-(2-carboxy-ethyl)-3-{6-[5-(2-difluoromethoxy-benzylcarbamoyl)-biphenyl-3-yloxy]-hexyl}-phenoxy)-butyric acid (129 mg, 80%) as a white amorphous solid的产率得到4-[2-(2-carboxy-ethyl)-3-{6-[5-(2-difluoromethoxy-benzylcarbamoyl)-biphenyl-3-yloxy]-hexyl}-phenoxy]-butyric acid