Synonyms: 6-ALPHA-HYDROXETHYNYLESTRADIOL;6A-HYDROXY ETHINYL ESTRADIOL;1,3,5(10)-ESTRATRIEN-17-ALPHA-ETHYNYL-3,6-ALPHA, 17-BETA-TRIOL;(6A,17A)-19-NORPREGNA-1,3,5(10)-TRIENYNE-3,6,17-TRIOL;(6BETA,17A)-19-NORPREGNA-1,3,5(10)-TRIEN-20-YNE-3,6,17-TRIOL;6A-HYDROXY-17A-ETHYNYLESTRADIOL;6BETA-HYDROXY-17A-ETHYNYLESTRADIOL