Phytochemical investigation of Helleborus niger L. (Ranunculaceae) leaf methanol extract allowed to isolate a phenolic glucoside derivative and two flavonoid glycosides characterized as phenyllactic acid 2-O-beta-D-glucopyranoside (1), quercetin 3-O-2-(E-caffeoyl)-alpha-L-arabinopyranosyl-(1 -> 2)-beta-D-glucopyranoside-7-O-beta-D-glucopyranoside (2), and kaempferol 3-O-alpha-L-arabinopyranosyl-(1 -> 2)-beta-D-galactopyranoside-7-O-beta-D-glucopyranoside (3), respectively. Compounds 1 and 2 were isolated for the first time and their structural characterization was obtained on the basis of extensive NMR spectral studies.
Study on secondary metabolites content of Helleborus niger L. leaves
BRACA, ALESSANDRA;
2011-01-01
Abstract
Phytochemical investigation of Helleborus niger L. (Ranunculaceae) leaf methanol extract allowed to isolate a phenolic glucoside derivative and two flavonoid glycosides characterized as phenyllactic acid 2-O-beta-D-glucopyranoside (1), quercetin 3-O-2-(E-caffeoyl)-alpha-L-arabinopyranosyl-(1 -> 2)-beta-D-glucopyranoside-7-O-beta-D-glucopyranoside (2), and kaempferol 3-O-alpha-L-arabinopyranosyl-(1 -> 2)-beta-D-galactopyranoside-7-O-beta-D-glucopyranoside (3), respectively. Compounds 1 and 2 were isolated for the first time and their structural characterization was obtained on the basis of extensive NMR spectral studies.File in questo prodotto:
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