4712-12-3 4H-1-Benzopyran-4-one, 2-(3,4-dimethoxyphenyl)-5,7-dihydroxy- 5,7-Dihydroxy-3',4'-dimethoxyflavone Flavone, 5,7-dihydroxy-3',4'-dimethoxy- Kampferol-3,4'-dimethyl ether NSC128305