Acetic acid (8R,9S,13S,14S,17S)-13-methyl-6-oxo-2,3,4,6,7,8,9,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester 在
sodium tetrahydroborate 作用下,
以
异丙醇 为溶剂,
生成 Acetic acid (6S,8R,9S,13S,14S,17S)-6-hydroxy-13-methyl-2,3,4,6,7,8,9,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester