9 11-DIDEHYDROESTRIOL;estra-1,3,5,9(11)-tetraene-3,16α,17β-triol;Estra-1,3,5,9(11)-tetraene-3,16a,17b-triol;(8S,13S,14S,16R,17R)-13-methyl-6,7,8,12,14,15,16,17-octahydrocyclopenta[a]phenanthrene-3,16,17-triol;Conjugated Estrogens EP Impurity A;Estriol EP Impurity A;Estra-1,3,5(10),9(11)-tetraene-3,16;Estra-1,3,5(10),9(11)-tetraene-3,16,17-triol, (16α,17β)-
9,11-Didehydrooestriol (Estriol EP Impurity A) is an impurity of Estriol (E888960), a metabolite of Estradiol (E888000). An estrogenic metabolite considerably less potent than the hormone Estradiol (E888000).