(3S,8S,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-11-methylene-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol;USP Desogestrel Related Compound B; (3?,17?)-13-Ethyl-11-methylene-18,19-dinorpregn-4-en-20-yne-3,17-diol;3?-Hydroxydesogestrel
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