Synonyms: | 13b-Ethyl-11-methylenegon-4-en-17-one;13-Ethyl-11-methylene-gon-4-en-17-one;Desogestrel InterMediates;Desogestrel EP IMpurity C;(8S,9S,10R,14S)-13-Ethyl-11-methylene-2,3,7,8,9,10,11,12,13, 14,15,16-dodecahydro-1H-cyclopenta[a;11-methylene-13-ethyl-gon-4-ene-17-one;(8S,9S,10R,14S)-13-Ethyl-11-methylene-2,3,7,8,9,10,11,12,13,14,15,16-dodecahydro-1H-cyclopenta;(8S,9S,10R,14S)-13-Ethyl-11-methylene-2,3,7,8,9,10,11,12,13,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthren-17(6H)-one |