Synonyms: B(9a)-Homo-19-norpregna-9(11),9a-dien-20-one,3-(dimethylamino)-4,4,14-trimethyl-, (3b,5a)-; Buxaminone; Ethanone,1-[9-(dimethylamino)-1,2,3,3a,4,7,8,9,10,10a,11,12,12a,12b-tetradecahydro-3a,10,10,12b-tetramethylbenzo[4,5]cyclohept[1,2-e]inden-3-yl]-,[3S-(3a,3aa,9a,10ab,12aa,12bb)]-