English Synonyms: (17-alpha)-17-(Acetyloxy)-19-norpregn-4-en-20-yn-3-one;(17α)-17-(acetyloxy)-19-norpregn-4-en-20-yn-3-one;17-acetoxy-19-nor-17-alpha-pregn-4-en-20-yn-3-on;17-acetoxy-19-nor-17-alpha-pregn-4-en-20-yn-3-one;17-Acetoxy-19-nor-17alpha-pregn-4-en-20-yn-3-one;17-acetyloxy(17-alpha)-19-norpregn-4-estren-17-beta-ol-acetate-3-one;17-Acetyloxy(17alpha)-19-norpregn-4-estren-17beta-ol-acetate-3-one;17alpha-Ethinyl-19-nortestosterone 17beta-acetate