Acetic acid (3S,9S,10R,13R,14S,17R)-17-((E)-(1R,4S)-4-ethyl-1,5-dimethyl-hex-2-enyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 在
potassium chromate 、
乙酸酐 作用下,
以
溶剂黄146 、
苯 为溶剂,
生成
Acetoxy-3β oxo-7 bisnorcholen-5-al