(4aS,4bR,10bS,12aS)-8-Hydroxy-12a-methyl-3,4,4a,4b,5,6,10b,11,12,12a-decahydro-1H-naphtho[2,1-f]isochromen-1-one; Estriol EP Impurity I;3-Hydroxy-17-oxa-17a-homoestra-1,3,5(10)-trien-17a-one
(4aS,4bR,10bS,12aS)-8-Hydroxy-12a-methyl-3,4,4a,4b,5,6,10b,11,12,12a-decahydro-1H-naphtho[2,1-f]isochromen-1-one; Estriol EP Impurity I;3-Hydroxy-17-oxa-17a-homoestra-1,3,5(10)-trien-17a-one