Acetic acid (3S,5S,8S,9S,10S,11R,12S,13S,14S)-17-acetyl-10,13-dimethyl-2,3,4,5,6,7,8,9,10,11,12,13,14,15-tetradecahydro-1H-20-oxa-cyclopropa[11,12]cyclopenta[a]phenanthren-3-yl ester 在
高氯酸 作用下,
以
丙酮 为溶剂,
生成
11β.12α-Dihydroxy-3β-acetoxy-5α-pregnen-(16)-on-(20)