skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Index

Identification of Oxidation Products of (−)-Epigallocatechin Gallate and (−)-Epigallocatechin with H 2 O 2

Zhu, Nanqun ; Huang, Tzou-Chi ; Yu, Younong ; Lavoie, Edmond J. ; Yang, Chung S. ; Ho, Chi-Tang

Journal of Agricultural and Food Chemistry, 04/2000, Vol.48(4), pp.979-981 [Peer Reviewed Journal]

Full text available

View all versions
Citations Cited by
  • Title:
    Identification of Oxidation Products of (−)-Epigallocatechin Gallate and (−)-Epigallocatechin with H 2 O 2
  • Author: Zhu, Nanqun ; Huang, Tzou-Chi ; Yu, Younong ; Lavoie, Edmond J. ; Yang, Chung S. ; Ho, Chi-Tang
  • Description: (−)-Epigallocatechin gallate (EGCG) and (−)-epigallocatechin (EGC) are two important antioxidants in tea. They also display some antitumor activities, and these activities are believed to be mainly due to their antioxidative effects. However, the specific mechanisms of antioxidant action of tea catechins remain unclear. In this study are isolated and identified two novel reaction products of EGCG and one product of EGC when they were reacted separately with H2O2. These products are formed by the oxidation and decarboxylation of the A ring in the catechin molecule. This study provides unequivocal proof that the A ring of EGCG and EGC may also be an antioxidant site. This study also indicates an additional reaction pathway for the oxidation chemistry of tea catechins. Keywords: Catechins; EGCG; EGC; antioxidants; H2O2
  • Is Part Of: Journal of Agricultural and Food Chemistry, 04/2000, Vol.48(4), pp.979-981
  • Identifier: ISSN: 0021-8561 ; E-ISSN: 1520-5118 ; DOI: http://dx.doi.org/10.1021/jf991188c
  • Subjects: Agriculture
  • Language: English

Searching Remote Databases, Please Wait