Desogestrel Impurity 3

17-Hydroxy-11-methylene-19-nor-17α-pregn-4-en-20-yn-3-one; (8S,9S,10R,13S,14S,17R)-17-Ethynyl-17
-hydroxy-13-methyl-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one;