Acetic acid (3S,5S,8R,9S,10R,13R,14S,17S)-17-((R)-1-acetoxy-ethyl)-10-iodomethyl-4,4,13,14-tetramethyl-11-oxo-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester 在
aluminum oxide 作用下,
以
苯 为溶剂,
生成 Acetic acid (3S,9R,10R,13R,14S,17S)-17-(1-acetoxy-ethyl)-4,4,13,14-tetramethyl-11-oxo-tetradecahydro-cyclopropa[9,10]cyclopenta[a]phenanthren-3-yl ester