Earticle

초록

영어

A novel benzoyl glucoside (4) and 13 known phenolic compounds were isolated from the leaves of Camellia japonica by a guided 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay. The structure of 4 was determined to be 4-hydroxy-2-methoxyphenol 1-O-β-D-(6'-O-p-hydroxylbenzoyl)-glucopyranoside (camelliadiphenoside). The 13 known compounds were identified as (E)-coniferyl alcohol (1), (-)-epicatechin (2), 4-hydroxyphenol 1-O-β-D-(6-O-p-hydroxybenzoyl) glucopyranoside (3), naringenin 7-O-β-D-glucopyranoside (5), quercetin 3-O-β-L-rhamnopyranosyl(1→6)-β-D-glucopyranoside (6), kaempferol 3-O-β-L-rhamnopyranosyl(1→6)-β-D-glucopyranoside (7), (+)-catechin (8), 1,6-di-O-p-hydroxybenzoyl-β-Dglucopyranoside (9), phloretin 2'-O-β-D-glucopyranoside (10), quercetin 3-O-β-D-glucopyranoside (11), quercetin 3-O-β-Dgalactopyranoside (12), kaempferol 3-O-β-D-galactopyranoside (13), and kaempferol 3-O-β-D-glucopyranoside (14). Their chemical structures were determined by the spectroscopic data of fast atom bondardment mass spectrometry (FABMS) and nuclear magnetic resonance (NMR). Flavonoids having the catechol moiety showed significantly higher DPPH radical scavenging activity than other isolated compounds having monohydroxy phenyl group.

목차

Abstract
 Introduction
 Material and Methods
  Plant material
  Chemicals
  Isolation of antioxidative compounds from hot waterextract
  Structural analysis
  Assay of DPPH radical scavenging
 Results and Discussion
  Antioxidative activity of solvent fractions
  Isolation of active compounds from the EtOAc-solubleneutral fraction
  Structure determination of a novel compound
  Identification of the 13 known compounds
  DPPH radical scavenging activity of the isolatedcompounds
 References

키워드

저자

• Jeong-Yong Cho [ Department of Food Science and Technology, and Functional Food Research Center, Chonnam National University ]
• Soo-Hyun Ji, [ Soo-Hyun Ji | Department of Food Science and Technology, and Functional Food Research Center, Chonnam National University ]
• Jae-Hak Moon [ Department of Food Science and Technology, and Functional Food Research Center, Chonnam National University ]
• Kye-Han Lee [ Division of Forest Resources and Landscape Architecture, College of Agriculture & Life Sciences, Chonnam National University ]
• Kyung-Hee Jung [ Jeonnam Biotechnology Research Center ]
• Keun-Hyung Park [ Department of Food Science and Technology, and Functional Food Research Center, Chonnam National University ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  Food Science and Biotechnology

• 간기

  격월간

• pISSN

  1226-7708

• 수록기간

  1992~2009

• 십진분류

  KDC 574 DDC 664