英文别名Levonorgestrel Impurity C; 13-Ethyl-3-ethynyl-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol; (8R,9S,10R,13S,14S,17R)-13-ethyl-3,17-diethynyl-2,7,8,9,10,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-17-ol; Levonorgestrel impurity C [EP]; 18,19-Dinorpregna-3,5-dien-20-yn-17-ol, 13-ethyl-3-ethynyl-, (17α)-; Levonorgestrel Imp. C (EP); Levonorgestrel Impurity 3; Levonorgestrel EP IMP C; levonorgestrel imp C 
