[(8S,9R,11S,13S,14S,17S)-17-acetyloxy-17-ethynyl-9-hydroxy-13-methyl-11-nitrooxy-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-3-yl] acetate 生成
[(8S,9R,11S,13S,14S,17S)-17-ethynyl-3,11-dihydroxy-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-yl] acetate