Synonyms : (3 beta, 17 alpha)-19-Norpregn-4-en-20-yne-3, 17 diol Diacetate, Continuin, Ethyndiol Diacetate, Ethynodiol Diacetate, (17 alpha)-Isomer, Femulen, Diacetate, Ethyndiol, Diacetate, Ethynodiol