(2'R,7R,8R,9S,10R,13S,14S)-10,13-dimethyl-7-(methylthio)-1,6,7,8,9,10,11,12,13,14,15,16-dodecahydro-3'H-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,5'(2H,4'H)-dione
(2'R,7R,8R,9S,10R,13S,14S)-10,13-dimethyl-7-(methylthio)-1,6,7,8,9,10,11,12,13,14,15,16-dodecahydro-3'H-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,5'(2H,4'H)-dione