(17-alpha)-19-Norpregn-4-en-17-ol 17alpha-Ethyl-17beta-hydroxy-4-estrene 17alpha-Ethylestr-4-en-17beta-ol 17beta-Hydroxy-17alpha-ethyl-19-nor-4-androstene 19-Nor-17-alpha-pregn-4-en-17-ol 19-Nor-17alpha-pregn-4-en-17-ol (8CI) 19-Nor-17alpha-pregn-4-en-17beta-ol 19-Norpregn-4-en-17-ol, (17-alpha)- (9CI) 19-Norpregn-4-en-17-ol, (17alpha)- 965-90-2 DEA No. 4000 Durabolin-O Duraboral EINECS 213-523-6 ETHYLESTRENOL Estr-4-en-17beta-ol, 17-ethyl- Ethylestrenol [USAN:INN] Ethylestrenolum [INN-Latin] Ethylnandrol Ethyloestrenol Ethyloestrenolum Etilestrenol [INN-Spanish] Etilestrenolo [DCIT] HSDB 3327 Maxibalin Maxibolin NSC 37726 Neodurabolin ORG-483 Orabolin Orgabolin Orgaboral