Acetic acid (3S,9R,10S,13R,14R,17R)-17-((R)-1,5-dimethyl-4-oxo-hexyl)-10,13-dimethyl-2,3,4,5,6,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 在
吡啶 、 sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
生成
Acetic acid (3S,5S,10S,13R,14R,17R)-17-((R)-4-hydroxy-1,5-dimethyl-hexyl)-10,13-dimethyl-2,3,4,5,6,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl ester