1423-97-8 17-Dihydroequilenin EINECS 215-835-8 Estra-1,3,5,7,9-pentaene-3,17beta-diol beta-Dihydroequilenin beta-Dihydroequilenina [Spanish] beta-ESTRA-1,3,5,7,9-PENTAEN-3,17-DIOL