[(2Z)-2-[(8S,9R,10S,11S,13S,14S,16R)-9-fluoro-10,13,16-trimethyl-3-oxo-11-trimethylsilyloxy-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-17-ylidene]-2-trimethylsilyloxyethyl] acetate 生成
17α,20-epoxy-9α-fluoro-11β,20,21-trihydroxy-16α-methylpregna-1,4-dien-3-one 11,20-bis(trimethylsilyl)ether 21-acetate