(-)-13-Ethyl-17-hydroxy-18,19-dinor-17alpha-pregn-4-en-20-yn-3-one;13-beta-Ethyl-17alpha-ethynyl-17beta-hydroxygon-4-en-3-one;13-Ethyl-17-alpha-ethynyl-17-beta-hydroxy-4-gonen-3-one;13-Ethyl-17-alpha-ethynylgon-4-en-17-beta-ol-3-one;17-alpha-Ethinyl-13-beta-ethyl-17-beta-hydroxy-4-estren-3-one;17-alpha-Ethynyl-13-ethyl-19-nortestosterone;17-Ethynyl-18-methyl-19-nortestosterone;17alpha-Ethynyl-13beta-ethyl-3-oxo-4-estren-17beta-ol;17alpha-Ethynyl-17-hydroxy-18-methylestr-4-en-3-one;17alpha-Ethynyl-18-homo-19-nortestosterone;18-Methyl-17-alpha-ethynyl-19-nortestosterone;18-Methylnorethisterone;D(-)-Norgestrel;Jadelle;Levonelle;Levonorgestrelum;Levonova;Microlut;Microluton;Microval;Mirena;NorLevo;Plan b;Postinor;(-)-13-Ethyl-17-hydroxy-18,19-dinor-17a-pregn-4-en-20-yn-3-one;(-)-13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one;13-b-Ethyl-17a-ethynyl-17b-hydroxygon-4-en-3-one;13-β-ethyl-17α-ethynyl-17β-hydroxygon-4-en-3-one;13-Ethyl-17-a-ethynyl-17-b-hydroxy-4-gonen-3-one;13-Ethyl-17-α-ethynyl-17-β-hydroxy-4-gonen-3-one;13-Ethyl-17-a-ethynylgon-4-en-17-b-ol-3-one;13-Ethyl-17-α-ethynylgon-4-en-17-β-ol-3-one;17-a-Ethinyl-13-b-ethyl-17-b-hydroxy-4-estren-3-one;17-α-ethinyl-13-β-ethyl-17-β-hydroxy-4-estren-3-one;17-a-Ethynyl-13-ethyl-19-nortestosterone;17-α-ethynyl-13-ethyl-19-nortestosterone;17a-Ethynyl-13b-ethyl-3-oxo-4-estren-17b-ol;17α-ethynyl-13β-ethyl-3-oxo-4-estren-17β-ol;17a-Ethynyl-17-hydroxy-18-methylestr-4-en-3-one;17α-ethynyl-17-hydroxy-18-methylestr-4-en-3-one;17a-Ethynyl-18-homo-19-nortestosterone;17α-ethynyl-18-homo-19-nortestosterone;18-Methyl-17-a-ethynyl-19-nortestosterone;18-Methyl-17-α-ethynyl-19-nortestosterone;Levonorgestrel alcala brand;Levonorgestrel hexal brand;Norplant;Paladin brand OF levonorgestrel;Vikela;Wyeth brand OF levonorgestrel;Duofem;L-Norgestrel;Aventis pharma brand OF levonorgestrel;Berlex brand OF levonorgestrel;HRA brand 1 OF levonorgestrel;Hexal brand OF levonorgestrel;Levonorgestrel paladin brand;Levonorgestrel wyeth brand;Norplant 2;Alcala brand OF levonorgestrel;Capronor;Cerazet;D-Norgestrel;HRA brand 2 OF levonorgestrel;Norplant-2;Schering brand 3 OF levonorgestrel;L Norgestrel;D Norgestrel;Levonorgestrel berlex brand;Norgeston;Norplant2;Schering brand 1 OF levonorgestrel;Schering brand 2 OF levonorgestrel;Women's capital brand OF levonorgestrel