Acetic acid (8R,9S,13S,17S)-3-acetoxy-13-methyl-7,8,9,11,12,13,16,17-octahydro-6H-cyclopenta[a]phenanthren-17-yl ester 在
间氯过氧苯甲酸 作用下,
以
氯仿 为溶剂,
以19%的产率得到Acetic acid (8R,9S,13R,14S,15R,17S)-3-acetoxy-13-methyl-6,7,8,9,11,12,13,15,16,17-decahydro-20-oxa-cyclopropa[14,15]cyclopenta[a]phenanthren-17-yl ester