[(5R,8R,9S,10R,13S,14S,17S)-17-Acetoxy-4,4,10,13-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-(3E)-ylidene]-acetic acid ethyl ester 在
氢氧化钾 作用下,
以
甲醇 为溶剂,
生成 [(5R,8R,9S,10R,13S,14S,17S)-17-Hydroxy-4,4,10,13-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-(3E)-ylidene]-acetic acid 2-dimethylamino-ethyl ester