Acetic acid (R)-5-((3S,5R,6R,8S,9S,10R,13R,14S,17R)-5-hydroxy-10,13-dimethyl-3,6-bis-trimethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-1,1,2-trimethyl-hexyl ester 生成 (3S,5R,6R,8S,9S,10R,13R,14S,17R)-10,13-Dimethyl-17-((R)-1,4,5-trimethyl-hex-5-enyl)-3,6-bis-trimethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-5-ol