Synonyms: 19-Nor-17a-pregna-4,9,11-trien-20-yn-3-one,17-hydroxy- (7CI,8CI); 17-Hydroxy-19-nor-17a-pregna-4,9,11-trien-20-yn-3-one; 17a-Ethynyl-17-hydroxyestratrien-3-one;17a-Ethynyl-17b-hydroxy-3-oxo-4,9,11-estratriene;17a-Ethynyl-3-oxo-4,9,11-estratrien-17b-ol; 17a-Ethynyl-4,9,11-estratrien-17b-ol-3-one; 3-Oxo-17a-ethynyl-17b-hydroxyestra-4,9,11-triene; A301; A 301 (steroid); NSC 101105; Norgestrienone; Ogyline; Planor; R 2010; RU2010