Synonyms: Cyclopenta[7,8]phenanthro[10,1-bc]furan,pregn-5-eno[6,5,4-bc]furan deriv.; Cyclopenta[7,8]phenanthro[10,1-bc]furan,9-ethyl-1,2,3,6,6a,6b,7,8,9,9a,10,11,11a,11b-tetradecahydro-9a,11b-dimethyl-,[6aS-(6aa,6bb,9a,9aa,11ab,11ba)]-; [6aS-(6aa,6bb,9a,9aa,11ab,11ba)]-9-Ethyl-1,2,3,6,6a,6b,7,8,9,9a,10,11,11a,11b-tetradecahydro-9a,11b-dimethylcyclopenta[7,8]phenanthro[10,1-bc]furan