Synonyms: 19-Nor-17a-pregn-4-en-20-yne-3b,17-diol, diacetate (7CI,8CI);19-Norpregn-4-en-20-yne-3,17-diol, diacetate, (3b,17a)- (9CI);17-Ethynyl-19-norandrost-4-ene-3b,17b-diol diacetate;17a-Ethynyl-4-estren-3b,17-diol diacetate;17a-Ethynyl-4-estrene-3b,17b-diacetate;17a-Ethynyl-4-estrene-3b,17b-diol diacetate;3b,17b-Diacetoxy-19-nor-17a-pregn-4-en-20-yne;8080CB;Cervicundin;Continuin;Ethinodiol diacetate;Ethynodiol acetate;Femulen;Luteonorm;Luto-Metrodiol;Metrodiol;Metrodiol, diacetate;SC 11800;b-Ethynodiol diacetate;