1245-15-4 2-(3,4-Dimethoxyphenyl)-5-hydroxy-3,7-dimethoxy-4-benzopyrone 4H-1-Benzopyran-4-one, 2-(3,4-dimethoxyphenyl)-5-hydroxy-3,7-dimethoxy- (9CI) EINECS 214-991-4 Flavone, 5-hydroxy-3,3',4',7-tetramethoxy- (8CI) NSC 408169 NSC 61837 Quercetin 3,7,3',4'-tetramethyl ether Quercetin 3,7,3',4'-tetramethylether Quercetin tetramethylether Retusin (Ariocarpus) Retusin (VAN) Retusine (Ariocarpus) Retusine (VAN)