A doublet at δ ppm 6.40(1H, J=2.29Hz) and A five broad singlet at δ ppm 6.18 (5H,J=1.91Hz) due to four phenolic protons and one aromatic alcoholic proton. From the above spectral data it appeared to be quercetin and confirmed by comparison with an authentic
A doublet at δ ppm 6.40(1H, J=2.29Hz) and A five broad singlet at δ ppm 6.18 (5H,J=1.91Hz) due to four phenolic protons and one aromatic alcoholic proton. From the above spectral data it appeared to be quercetin and confirmed by comparison with an authentic