Phenylvaleric acid and flavonoid glycosides from Polygonum salicifolium


Calis I., Kuruuzum A. , Demirezer L. , Sticher O., Ganci W., Ruedi P.

Journal of Natural Products, cilt.62, sa.8, ss.1101-1105, 1999 (SCI Expanded İndekslerine Giren Dergi) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 62 Konu: 8
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1021/np9900674
  • Dergi Adı: Journal of Natural Products
  • Sayfa Sayıları: ss.1101-1105

Özet

(3R)-O-β-D-Glucopyranosyloxy-5-phenylvaleric acid (1), (3R)-O-β-D- glucopyranosyloxy-5-phenylvaleric acid n-butyl ester (2), and a new dihydrochalcone diglycoside 4'-O-[β-D-glucopyranosyl-(1→-6)- glucopyranosyl]-oxy-2'-hydroxy-3',6'-dimethoxydihydrochalcone (3), together with six known flavonoid glycosides [kaempferol-3-O-β-D-glucopyranoside (= astragalin) (4), kaempferol-3-O-β-D-galactopyranoside (5), quercetin-3-O-β- D-glucopyranoside (= isoquercitrin) (6), quercetin-3-O-β-D-galactopyranoside (= hyperoside) (7), quercetin-3-O-(2'-O-galloyl)-β-D-glucopyranoside (8), and quercetin-3-O-β-D-glucuronopyranoside (9)] were isolated from the aerial parts of Polygonum salicifolium. The structure elucidation of the isolated compounds was performed by spectroscopic (UV, IR, ESI-MS, 1D- and 2D-NMR), chemical (methylation, enzymatic hydrolysis, partial synthesis), and chromatographic methods (HPLC, Chiralcel OD). The flavonoid glycosides (4-9) demonstrated scavenging properties toward the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical in TLC autographic assays.