17-Acetoxy-19-nor-17.alpha.-pregn-4-en-20-yn-3-one 17-Acetyloxy(17.alpha.)-19-norpregn-4-estren-17.beta.-ol-acetate-3-one 17-Ent 17-Hydroxy-19-nor-17.alpha.-pregn-4-en-20-yn-3-one acetate 17.alpha.-Ethinyl-19-nortestosterone 17.beta.-acetate 17.alpha.-Ethinyl-19-nortestosterone acetate 17.alpha.-Ethinyl-19-nortestosterone-17.beta.-acetate 17.alpha.-Ethynyl-17-hydroxyestr-4-en-3-one acetate 17.alpha.-Ethynyl-17.beta.-acetoxy-19-norandrost-4-en-3-one 17.alpha.-Ethynyl-19-nortestosterone acetate 17.beta.-Acetoxy-19-nor-17.alpha.-pregn-4-en-20-yn-3-one 17.beta.-Hydroxy-19-nor-17.alpha.-pregn-4-en-20-yn-3-one acetate 19-Nor-17.alpha.-pregn-4-en-20-yn-3-one, 17-hydroxy-, acetate 19-Norethisterone acetate 19-Norethynyltestosterone acetate 19-Norpregn-4-en-20-yn-3-one, 17-(acetyloxy)-, (17.alpha.)- 19-nor-17.alpha.-Pregn-4-en-20-yn-3-one, 17-acetoxy- 51-98-9 ENTA Estr-4-en-3-one, 17.alpha.-ethynyl-17-hydroxy-, acetate NSC22844 Norethindrone 17-acetate Norethindrone acetate Norethisteron acetate Norethisterone acetate Norethynyltestosterone acetate Norethysterone acetate Norlutate Norlutin acetate Norlutin-A Orlutate Primolut-Nor SH 420 SH-420C WLN: L E5 B666 OV MUTJ E FOV1 F1UU1 -B&EF component of Norlestrin component of Zorane