(4-amino-4,5,6,7-tetrahydro-indazol-1-yl)-acetic acid ethyl ester 、
3-硝基苯磺酰氯 以[4-(3-nitro-benzenesulfonylamino)-4,5,6,7-tetrahydro-indazol-1-yl]-acetic acid ethyl ester (519 mg, 63.6%) was obtained as a white solid的产率得到[4-(3-nitro-benzenesulfonylamino)-4,5,6,7-tetrahydro-indazol-1-yl]-acetic acid ethyl ester