Study on secondary metabolite content of Helleborus niger L. leaves

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• 作者：Sara Vitalini^a ; ^d ; Alessandra Braca^b ; ^{alessandra.braca@farm.unipi.it} ; Gelsomina Fico^c ; ^d
• 关键词：Helleborus niger ; Ranunculaceae ; Flavonol glycosides ; Phenyllactic acid ; Spectral analysis
• 刊名：Fitoterapia
• 出版年：2011
• 出版时间：March 2011
• 年：2011
• 卷：82
• 期：2
• 页码：152-154
• 全文大小：174 K

文摘

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-β-d-glucopyranoside (1), quercetin 3-O-2-(E-caffeoyl)-α-l-arabinopyranosyl-(1 → 2)-β-d-glucopyranoside-7-O-β-d-glucopyranoside (2), and kaempferol 3-O-α-l-arabinopyranosyl-(1 → 2)-β-d-galactopyranoside-7-O-β-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.