Synonyms: | 6-Oxo D-(-)-Norgestrel;(17α)-13-Ethyl-17-hydroxy-18,19-dinorpregn-4-en-20-yne-3,6-dione;Levonorgestrel IMpurity J (6-Keto Levonorgestrel);Levonorgestrel EP impurity J;(8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-2,7,8,9,10,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,6-dione;Levonorgestrel Impurity 10(Levonorgestrel EP Impurity J);Levonorgestrel EP Impurity J (6-Keto Levonorgestrel);Levonorgestrel EP IMP J |