(7alpha,8alpha)-7,8-Epoxy-3-hydroxyestra-1,3,5(10)-trien-17-one 55056-56-9 7,8-Epoxy-3-hydroxyestra-1,3,5(10)-trien-17-one (7alpha,8alpha)- Estra-1,3,5(10)-trien-17-one, 7,8-epoxy-3-hydroxy-, (7alpha,8alpha)-