Lignans from the fruits of the red pepper (Capsicum annuum L.) and their antioxidant effects

Dae Young Lee, Do Gyeong Lee, Jin Gyeong Cho, Myun Ho Bang, Ha Na Lyu, Youn Hyung Lee, Se Young Kim, Nam In Baek

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The fruits of Capsicum annuum were extracted using 80% aqueous MeOH, and fractionated using EtOAc and water. Repeated column chromatography using silica gel, octadecyl silica gel, and Sephadex LH-20 for the EtOAc fraction led to the isolation of a new lignan glycoside and a known one, icariside E5. From the results of spectroscopic data, including EIMS, FABMS, UV, IR, 1H and 13C-NMR, DEPT, and 2D-NMR (COSY, HSQC, HMBC), the chemical structure of the new lignan glycoside was determined as (8R)-isodehydrodiconiferyl alcohol-4'-O-(6"-vanilloyl)-β-D- glucopyranoside named vanilloylicariside E5. All isolated compounds were tested for antioxidant activities using 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. Icariside E5 (2) and (8R)-Isodehydrodiconiferyl alcohol (3) exhibited a strong scavenging effect on DPPH (2: IC50=42.1 μM, 3: IC50=4.5 μM).

Original languageEnglish
Pages (from-to)1345-1349
Number of pages5
JournalArchives of Pharmacal Research
Volume32
Issue number10
DOIs
StatePublished - Oct 2009

Keywords

  • (8R)- Isodehydrodiconiferyl alcohol
  • Antioxidant activity
  • Capsicum annuum L.
  • DPPH
  • Icariside E
  • Vanilloylicariside E

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