Flavonol triglycosides from seeds of Nigella sativa

Abstract Three new flavonoid glycosides quercetin and kaempferol 3-glucosyl(1 → 2)galactosyl(1 → 2)glucoside and quercetin 3-(6-feruloylglucosyl)(1 → 2)galactosyl(1 → 2)glucoside were isolated and identified from seeds of Nigella sativa . The structures have been elucidated by enzymic and acid hydrolysis and spectral data (UV, MS, 1 H and 13 CNMR) and confirmed by 2-D NMR.