(2'R,7S,8R,9S,10R,13S,14S)-10,13-dimethyl-7-((R)-methylsulfinyl)-7,8,9,10,11,12,13,14,15,16-decahydro-3'H-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,5'(4'H,6H)-dione
(2'R,7S,8R,9S,10R,13S,14S)-10,13-dimethyl-7-((R)-methylsulfinyl)-7,8,9,10,11,12,13,14,15,16-decahydro-3'H-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,5'(4'H,6H)-dione