Acetic acid (3R,5S,7R,8R,9S,10S,12S,13R,14S,17S)-7-formyloxy-3,12-dihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl ester 在
pyridinium chlorochromate 作用下,
以
二氯甲烷 为溶剂,
生成
Acetic acid (5R,7R,8R,9S,10S,13S,14S,17S)-7-formyloxy-10,13-dimethyl-3,12-dioxo-hexadecahydro-cyclopenta[a]phenanthren-17-yl ester