17-Deacetylnorgestimate 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, oxime, (17alpha)- 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, oxime, (8-alpha,9-beta,10-alpha,13-alpha,14-beta)- 18-Methylnorethindrone oxime 53016-31-2 BRN 4202099 D-Norgestrel 3-oxime Levonorgestrel oxime Norelgestromin Norelgestromin [INN] Norplant 3-oxime RWJ 10553