(17-alpha)-13-Ethyl-17-hydroxy-11-methylene-18,19-dinorpregn-4-en-20-yn-3-one (17alpha)-13-Ethyl-17-hydroxy-11-methylene-18,19-dinorpregn-4-en-20-yn-3-one 13-Ethyl-11-methylene-18,19-dinor-17-alpha-pregn-4-en-20-yn-3-one 13-Ethyl-17-hydroxy-11-methylene-18,19-dinor-17alpha-pregn-4-en-20-yn-3-one 165050-21-5 17-Ethinyl-17-beta-hydroxy-18-methyl-11-methylene-4-estren-3-one 18,19-Dinor-17alpha-pregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-11-methylene- 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-11-methylene-, (17-alpha)- 3-Keto-desogestrel 3-Ketodesogestrel 3-Oxodesogestrel 54048-10-1 EINECS 258-936-2 ETONOGESTREL Etonogestrel [USAN:INN] Implanon ORG 3236