Synonyms: | 17-ETHYNYLESTRADIOL;17a-Ethynylestriol);17-Ethynylestriol;(16α,17α)-19-Norpregna-1,3,5(10)-trien-20-yne-3,16,17-triol;19-Nor-17α-pregna-1,3,5(10)-trien-20-yne-3,16α,17-triol;17-alpha-Ethynylestriol;Estriol Impurity 10;19-Norpregna-1,3,5(10)-trien-20-yne-3,16,17-triol, (16α,17α)- |