(3S,4S,5S,6S)-6-((8S,9S,10R,13S,14S,17S)-13-Ethyl-17-ethynyl-11-methylene-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yloxy)-3,4,5-trihydroxy-tetrahydro-2H-pyran-2-carboxylic acid ;

(8S,9S,10R,13S,14S,17S)-17-Ethynyl-17-hydroxy-13-methyl-11-methylene-1,7,8,10,11,12,13,15,16,17-decahydro-2H-cyclopenta[a]phenanthren-3(6H,9H,14H)-one ; CAS # 54024-10-1 ;

Desogestrel EP Impurity D ; Desogestrel USP RC C ; 3-Keto Desogestrel ; (17α)-13-Ethyl-17-hydroxy-11-methylene-18,19-dinorpregn-4-en-20-yn-3-one ; 3-Ketodesogestrel ; 3-Oxodesogestrel ; CAS # 54048-10-1 ;

(8S,9S,10R,13S,14S)-3-Ethoxy-13-ethyl-11-methylene-1,7,8,9,10,11,12,13,15,16-decahydro-2H-cyclopenta[a]phenanthren-17(14H)-one ;

(8S,9S,10R,13S,14S,17S)-13-Ethyl-17-ethynyl-11,17-dihydroxy-11-methyl-1,7,8,10,11,12,13,15,16,17-decahydro-2H-cyclopenta[a]phenanthren-3(6H,9H,14H)-one ;

(6R,8S,9R,10R,13S,14S,17S)-13-Ethyl-17-ethynyl-6-hydroperoxy-17-hydroxy-10-methyl-11-methylene-1,7,8,10,11,12,13,15,16,17-decahydro-2H-cyclopenta[a]phenanthren-3(6H,9H,14H)-one ;

(6R,8S,9S,10R,13S,14S,17S)-13-Ethyl-17-ethynyl-6-hydroperoxy-17-hydroxy-11-methylene-1,7,8,10,11,12,13,15,16,17-decahydro-2H-cyclopenta[a]phenanthren-3(6H,9H,14H)-one ;

(8S,9S,10R,11R,13S,14S)-11-Hydroxy-13-methyl-1,7,8,9,10,11,12,13,15,16-decahydro-2H-cyclopenta[a]phenanthrene-3,17(6H,14H)-dione ; CAS # 6615-00-5 ;

Sodium (8S,9S,10R,13S,14S,17S)-13-ethyl-17-ethynyl-11-methylene-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl sulfate ;