Acetic acid (3S,5R,8S,9S,10R,13R,14S,17R)-17-((R)-4-acetoxy-1-methyl-4-phenyl-butyl)-4,4,13,14-tetramethyl-tetradecahydro-cyclopropa[9,10]cyclopenta[a]phenanthren-3-yl ester 生成 (5R,8S,9S,10R,13R,14S,17R)-4,4,13,14-Tetramethyl-17-((R)-1-methyl-4-oxo-4-phenyl-butyl)-tetradecahydro-cyclopropa[9,10]cyclopenta[a]phenanthren-3-one