(1S,4aS,4bS,8S,8aS)-8-tert-Butoxy-1,8a-dimethyl-1-(3-oxo-butyl)-dodecahydro-phenanthrene-2,10-dione 在
sodium hydroxide 作用下,
以
甲醇 为溶剂,
生成 (4aS,4bR,6aS,7S,10aS,10bS)-7-tert-Butoxy-4a,6a-dimethyl-3,4,4a,4b,6,6a,7,8,9,10,10a,10b,11,12-tetradecahydro-chrysene-2,5-dione 、 (3aR,6aR,7R,10aR,10bR,10cR)-5-Acetyl-7-tert-butoxy-3a,6a-dimethyl-1,3a,4,6,6a,7,8,9,10,10a,10b,10c-dodecahydro-2H-acephenanthrylen-3-one