Acetic acid (8S,9S,10R,13S,14S,17R)-17-(2-acetoxy-acetyl)-10,13-dimethyl-3,11-dioxo-8,9,10,11,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl ester 在
间氯过氧苯甲酸 作用下,
以
二氯甲烷 、
叔丁醇 为溶剂,
生成
17α,21-Dihydroxy-6α,7α-oxy-1,4-pregnadiene-3,11,20-trione 17,21-diacetate