Synonyms: 9,19-Cyclo-5a,9b-pregn-17(20)-en-16-one,4,4,14-trimethyl-3b-(methylamino)-, (E)- (8CI); Cyclobuxophyllinine (7CI); 16H,19H-Cyclopropa[9,10]cyclopenta[a]phenanthrene,9,19-cyclopregn-17(20)-en-16-one deriv.; (-)-(E)-Buxenone; (E)-Buxenone; Buxenone; Buxenone M; Cyclobuxophyllinine M