[5-(3,5-bis-methanesulfonyl-benzenesulfonylamino)-6,7,8,9-tetrahydro-5H-benzocyclohepten-1-yloxy]-acetic acid tert-butyl ester 、
sodium hydroxide 以to give [5-(3,5-bis-methanesulfonyl-benzenesulfonylamino)-6,7,8,9-tetrahydro-5H-benzocyclohepten-1-yloxy]-acetic acid (55 mg, 61% yield)的产率得到[5-(3,5-bis-methanesulfonyl-benzenesulfonylamino)-6,7,8,9-tetrahydro-5H-benzocyclohepten-1-yloxy]-acetic acid