6α-Hydroxy Ethynyl Estradiol

6-α-Hydroxy Ethinylestradiol

6α-Hydroxy-17α-ethynylestradiol

19-Nor-17α-pregna-1,3,5(10)-trien-20-yne-3,6α,17-triol

(6α,17α)-19-Norpregna-1,3,5(10)-trien-20-yne-3,6,17-triol

Ethynylestradiol IMpurity E (6-alpha-Hydroxy Ethynylestradiol)