IUPAC:(1R,3aS,3bS,10R,11aS)-10-(4-acetylphenyl)-11a-methyl-3'-methylidene-2,3,3a,3b,4,5,7,8,9,10,11,11a-dodecahydrospiro[cyclopenta[a]phenanthrene-1,2'-oxolan]-7-one
IUPAC:(1R,3aS,3bS,10R,11aS)-10-(4-acetylphenyl)-11a-methyl-3'-methylidene-2,3,3a,3b,4,5,7,8,9,10,11,11a-dodecahydrospiro[cyclopenta[a]phenanthrene-1,2'-oxolan]-7-one