Acetic acid (8R,9S,10R,13S,14S,17R)-17-acetyl-6-bromo-10,13-dimethyl-16-methylene-3-oxo-2,3,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl ester 在
sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
生成 Acetic acid (3S,8R,9S,10R,13S,14S,17R)-17-acetyl-6-bromo-3-hydroxy-10,13-dimethyl-16-methylene-2,3,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl ester