Norgestrel - (8R,9S,10R,13S,14S)-13-Ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one;
Norgestrel EP Impurity - A -(17Alpha)-(±)-13-Ethyl-17-hydroxy-18,19-dinorpregna-4,8(14)-dien-20-yn-3-one; 18,19-Dinorpregna-4,8(14)-dien-20-yn-3-one, 13-ethyl-17-hydroxy-, (17a)-(±) ;
Norgestrel EP Impurity - B - 18,19-Dinorpregn-5(10)-en-20-yn-3-one, 13-ethyl-17-hydroxy-, (17a)-(±);
Norgestrel EP Impurity - E - (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-8,9,10,11,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one ;
Norgestrel EP Impurity - G - (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-4,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3(2H)-one;