Not less than-95.0%
Levonorgestrel-ABC-triene; (9R,10R,13S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,9,10,11,12,13,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-3-one; 18,19-Dinorpregna-4,6,8(14)-trien-20-yn-3-one, 13-ethyl-17-hydroxy-, (17α); (17α)-13-Ethyl-17-hydroxy-18,19-dinorpregna-4,6,8(14)-trien-20-yn-3-one;