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