10116-22-0 17-Methyl-19-norpregna-4,9-diene-3,20-dione 17alpha-Methyl-19-demethylpregna-4,9-diene-3,20-dione 19-Norpregna-4,9-diene-3,20-dione, 17-methyl- (8CI)(9CI) Demegestona [INN-Spanish] Demegestone Demegestone [DCF:INN] Demegestonum [INN-Latin] EINECS 233-320-6 Lutionex NSC 118189 R 2453 RU 2453