(5alpha,10alpha)-5,10-Epoxyestr-9(11)-ene-3,17-dione cyclic bis(1,2-ethanediyl acetal) 3,3,17,17-Bis(ethylenedioxy)-5,10-oxidoestr-9(11)-ene 55180-24-0 Bed-epoxyestrene Estr-9(11)-ene-3,17-dione, 5,10-epoxy-, cyclic bis(1,2-ethanediyl acetal), (5alpha,10alpha)-