英文同义词: | (17a)-19-Norpregna-1,3,5(10)-trien-20-yne-3,4,17-triol;17a-Ethynylestra-1,3,5(10)-triene-3,4,17-triol;19-Nor-17a-pregna-1,3,5(10)-trien-20-yne-3,4,17-triol;4-hydroxyethynylestradiol;17alpha-ethynyl-4-hydroxyestradiol;19-Norpregna-1,3,5(10)-trien-20-yne-3,4,17-triol, (17α)-;Ethinylestradiol 4-Hydroxy Impurity |