Acetic acid (4R,5R,8S,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-3,4,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-20-oxa-cyclopropa[4,5]cyclopenta[a]phenanthren-17-yl ester 在
sodium tetrahydroborate 、
三正丁基氢锡 作用下,
以
苯 为溶剂,
生成
3α,5β-Dihydroxy-17β-acetoxy-androstan