Not less than-95.0%
18-Methylestrone methyl ether; (8R,9S,13S,14S)-13-ethyl-3-methoxy-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one; Gona-1,3,5(10)-trien-17-one, 13-ethyl-3-methoxy; 13-Ethyl-3-methoxygona-1,3,5(10)-trien-17-one;