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  (5R,8S,9R,10S,13S,14S,17R)-13-ethyl-17-ethynyl-11-methylene-2,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-ol

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  17-β-Desogestrel

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  Desogestrel

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  Desogestrel EP Impurity A

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  Desogestrel Impurity

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