甲酸甲酯 、 (5S,8R,9S,10S,13S,14S,17R)-17-Hydroxy-10,13-dimethyl-17-phenyl-hexadecahydro-cyclopenta[a]phenanthren-3-one 在
sodium methylate 作用下,
生成
(5S,8R,9S,10S,13S,14S,17R)-17-Hydroxy-2-[1-hydroxy-meth-(Z)-ylidene]-10,13-dimethyl-17-phenyl-hexadecahydro-cyclopenta[a]phenanthren-3-one