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.
|Autori:||S. VITALINI; A. BRACA; G. FICO|
|Titolo:||Study on secondary metabolites content of Helleborus niger L. leaves|
|Anno del prodotto:||2011|
|Digital Object Identifier (DOI):||10.1016/j.fitote.2010.08.012|
|Appare nelle tipologie:||1.1 Articolo in rivista|