Estra-5(10),9(11)-diene-3,17-dione, cyclic 3-(1,2-ethanediyl acetal)
Estra-5(10),9(11)-diene-3,17-dione, cyclic 3-(ethylene acetal)
Spiro[3H-cyclopenta[a]phenanthrene-3,2′-[1,3]dioxolane], estra-5(10),9(11)-diene-3,17-dione deriv.
3,3-(Ethylenedioxy)estra-5(10),9(11)-dien-17-one
Ethylene deltenone