1247-97-8 3,3',4',5,7-Pentamethoxyflavone 4H-1-Benzopyran-4-one, 2-(3,4-dimethoxyphenyl)-3,5,7-trimethoxy- (9CI) Flavone, 3,3',4',5,7-pentamethoxy- (8CI) NSC 115922 Penta-O-methylquercitin Pentamethoxyquercetin Quercetin pentamethyl ether