Synonyms: | 4-Methyl Ethynyl Estradiol;(17α)-4-Methyl-19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol;4-Methyl-ethinylestradiol;4-METHYL-17-ETHYNYL ESTRADIOL;19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 4-methyl-, (17α)- (9CI);Ethinylestradiol EP Imp K;(8R,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol;Ethinylestradiol Impurity 11(Ethinylestradiol EP Impurity K) |