Synonyms: (5r,8r,9r,10s,13s,14s,17s)-13-methyltetradecahydro-3'h-spiro[cyclopenta[a]phenanthrene-17,2'-furan]-3,5'(2h,4'h)-dione;AC1L6I5Q;AC1Q6J3D;KST-1A8404;NSC59610;AR-1A6487;NSC-59610;(5R,8R,9R,10S,13S,14S,17S)-13-methylspiro[1,2,4,5,6,7,8,9,10,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthrene-17,5'-oxolane]-2',3-dione