Furthermore, there was only one anomeric proton signal of sugar moiety attached to a flavonoid skeleton (doublet at δ 5.4) proving the presence of rhamnosyl moiety (with a methyl group at 1.1 ppm).
Furthermore,there was only one anomeric proton signal of sugar moiety attached to a flavonoid skeleton (doublet at δ 5.4) proving thepresence of rhamnosyl moiety (with a methyl group at 1.1ppm).