| Synonyms: | 3,20-bis(ethylenedioxy)pregna-5,7-diene;Pregna-5,7-diene-3,20-dione bis(ethylene acetal);Einecs 243-175-0;10,13-dimethyl-17-(2-methyl-1,3-dioxolan-2-yl)spiro[1,2,4,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,2'-1,3-dioxolane];Pregna-5,7-diene-3,20-dione, cyclic 3,20-bis(1,2-ethanediyl acetal);Dydrogesterone Impurity 4;Pregna-5,7-diene-3,20-dione,cyclic bis(1,2-ethanediyl acetal) (9CI);intermediate of dydrogesterone |