IUPAC:(1R,2R,3aS,3bS,9aS,9bR,10S,11aS)-9b-fluoro-10-hydroxy-2,9a,11a-trimethyl-2,3,3a,3b,4,5,7,9a,9b,10,11,11a-dodecahydrospiro[cyclopenta[a]phenanthrene-1,2'-oxetane]-3',7-dione
IUPAC:(1R,2R,3aS,3bS,9aS,9bR,10S,11aS)-9b-fluoro-10-hydroxy-2,9a,11a-trimethyl-2,3,3a,3b,4,5,7,9a,9b,10,11,11a-dodecahydrospiro[cyclopenta[a]phenanthrene-1,2'-oxetane]-3',7-dione