Desogestrel STD-(17α)-13-Ethyl-11-methylene-18,19-dinorpregn-4-en-20-yn-17-ol; Cerazette;Cyclosa; Dicromil; Marvelon 150/320; Org 2969; 18,19-Dinorpregn-4-en-20-yn-17-ol, 13-ethyl-11-methylene-, (17α)-; (USP); (8S,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-11-methylidene-1,2,3,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-ol
Desogestrel EP-Impurity-A-(5α,17α)-13-Ethyl-11-methylene-18,19-dinorpregn-3-en-20-yn-17-ol; (5S,8S,9R,10S,13S,14S,17R)-13-ethyl-17-ethynyl-11-methylidene-1,2,5,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-ol
Desogestrel EP-Impurity-B-11-Methylidene-19-nor-17α-pregn-4-en-20-yn-17-ol; (8S,9S,10R,13S,14S,17R)-17-ethynyl-13-methyl-11-methylidene-1,2,3,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-ol
Desogestrel EP-Impurity-C-(8S,9S,10R,14S)-13-ethyl-11-methylidene-1,2,3,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-one; 13-Ethyl-11-methylidenegon-4-en-17-one
Desogestrel EP-Impurity-D-(8S,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one; 13-ethyl-17-hydroxy-11-methylidene-18,19-dinor-17α-pregn-4-en-20-yn-3-one
