[2-[(8S,10R,13S,14S)-10,13-dimethyl-3-oxo-1,2,6,7,8,12,14,15-octahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] acetate 、
三乙基硅烷 生成 [(2E)-2-[(8S,10R,13S,14S)-10,13-dimethyl-3-oxo-2,6,7,8,12,14,15,16-octahydro-1H-cyclopenta[a]phenanthren-17-ylidene]-2-triethylsilyloxyethyl] acetate