3-keto-desogestrel [ 13-ethyl-17-hydroxy-11-methylene-18,19-dinor-17alpha-pregn-4-en-20-yn-3-one,3-ketodesogestrel,3-oxo desogestrel,3-oxodesogestrel,Implanon,Nourypharma brand of 3-keto-desogestrel,Organon brand of 3-keto-desogestrel,etonogestrel,nexplanon ] metabolite of DESOGESTREL; structure given in first source; Implanon: implant containing etonogestrel (3-keto-desogestrel)