英文名称
methyl (10S,13S)-10,13-dimethyl-3,5'-dioxospiro[2,6,7,8,12,14,15,16-octahydro-1H-cyclopenta[a]phenanthrene-17,2'-oxolane]-7-carboxylate;methyl (10R,13S)-10,11,13-trimethyl-3,5'-dioxospiro[2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-17,2'-oxolane]-7-carboxylate