Synonyms: | Equilin,cyclic ethylene acetal (7CI); Estra-1,3,5(10),7-tetraen-17-one, 3-hydroxy-,cyclic ethylene acetal (8CI);Spiro[17H-cyclopenta[a]phenanthrene-17,2'-[1,3]dioxolane],estra-1,3,5(10),7-tetraen-17-one deriv.;17,17-Ethylenedioxyestra-1,3,5(10),7-tetraen-3-ol |