Acetic acid (1R,2R,5S,10S,13S,17S)-1,10,13-trimethyl-3-oxo-hexadecahydro-20-oxa-cyclopropa[1,2]cyclopenta[a]phenanthren-17-yl ester 在
吡啶 、
aluminum oxide 、 sodium tetrahydroborate 作用下,
以
水 、
苯 为溶剂,
反应 48.0h,
生成
Acetic acid (1R,2R,3R,5S,8S,9S,10S,13S,14S,17S)-17-acetoxy-2-formyloxy-1-hydroxy-1,10,13-trimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester