(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 (8S,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-11-methylene-1,2,3,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-ol 54024-22-5 C07629 Desogestrel 13-ethyl-11-methylene-18,19-dinorpregn-4-en-20-yn-17alpha-ol LMST02030104 Cerazette (17alpha)-13-Ethyl-11-methylene-18,19-dinorpregn-4-en-20-yn-17-ol Org-2969 D02367 Desogestrel (USAN) 13-Ethyl-11-methylene-18,19-dinor-17alpha-pregn-4-en-20-yn-17-ol 18,19-Dinorpregn-4-en-20-yn-17-ol, 13-ethyl-11-methylene-, (17alpha)- Desogestrel [USAN:BAN:INN] Desogestrelum [INN-Latin] EINECS 258-929-4 HSDB 3593 ORG 2969