Synonyms: (8r,9s,10r,13s,14s,17r)-10,13-dimethyl-1,4',5',6,7,8,9,10,11,12,13,14,15,16-tetradecahydro-3'h-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,3'(2h)-dione;NSC49638;AC1L682T;KST-1A3277;AR-1A7237;NSC-49638;(8R,9S,10R,13S,14S,17R)-10,13-dimethylspiro[2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-17,2'-oxolane]-3,3'-dione