Synonyms: Benzo[fg]cyclopent[a]anthracene,benzo[4,5,6]pregn-4-ene deriv.; Benzo[fg]cyclopent[a]anthracene,3-ethyl-1,2,3,3a,4,5,5a,5b,6,7,8,12,12a,12b-tetradecahydro-3a,5b-dimethyl-,[3S-(3a,3aa,5ab,5ba,12aa,12bb)]-; [3S-(3a,3aa,5ab,5ba,12aa,12bb)]-3-Ethyl-1,2,3,3a,4,5,5a,5b,6,7,8,12,12a,12b-tetradecahydro-3a,5b-dimethylbenzo[fg]cyclopenta[a]anthracene