Synonyms: Flavone,3,3',4',5,7-pentamethoxy- (7CI,8CI); 3,3',4',5,7-Pentamethoxyflavone;3,3',4',5,7-Pentamethylquercetin; 3,5,7,3',4'-Pentamethoxyflavone; NSC 115922;NSC 618936; Penta-O-methylquercetin; Pentamethoxyquercetin;Pentamethylquercetin; Quercetin pentamethyl ether; TUM 8437