Synonyms: 19-Nor-17a-pregna-1,3,5(10)-trien-20-yne-3,17-diol(6CI,7CI,8CI);17-Ethinyl-3,17-estradiol;17-Ethinylestradiol;17-Ethynylestra-1,3,5(10)-triene-3,17b-diol;17a-Ethinyl-3,17-dihydroxy-D1,3,5-estratriene;17a-Ethynylestra-3,17b-diol;17a-Ethynylestradiol;19-Nor-17a-pregna-1,3,5(10)-trien-20-yne-3,17b-diol;Amenoron;Chee-O-Gen;Esteed;Estoral;Estorals;Estradiol, 17-ethynyl-;Ethidol;Ethinoral;Ethynylestradiol;Ethynyloestradiol;Eticyclin;Eticyclol;Follicoral;Ginestrene;Linoral;Lynoral;Microfollin;NSC 10973;Oradiol;Orestralyn;Primogyn C;Progynon C;