Chemical studies of the antioxidant mechanism of tea catechins: radical reaction products of epicatechin with peroxyl radicals

S Sang, S Tian, H Wang, RE Stark, RT Rosen… - Bioorganic & medicinal …, 2003 - Elsevier
Tea catechins, an important class of polyphenols, have been shown to have antioxidant
activity and are thought to act as antioxidants in biological systems. However, the …

Antioxidant chemistry of green tea catechins. New oxidation products of (−)-epigallocatechin gallate and (−)-epigallocatechin from their reactions with peroxyl radicals

S Valcic, JA Burr, BN Timmermann… - Chemical research in …, 2000 - ACS Publications
The green tea catechins (−)-epigallocatechin gallate (EGCG) and (−)-epigallocatechin
(EGC) react with peroxyl radicals generated by thermolysis of the azo initiator 2, 2 '-azobis …

Antioxidant chemistry of green tea catechins. Identification of products of the reaction of (−)-epigallocatechin gallate with peroxyl radicals

S Valcic, A Muders, NE Jacobsen… - Chemical research in …, 1999 - ACS Publications
(−)-Epigallocatechin gallate (EGCG), isolated from green tea, displays antioxidant properties
and is thought to act as an antioxidant in biological systems. However, the specific …

Mechanistic studies of catechins as antioxidants against radical oxidation

K Kondo, M Kurihara, N Miyata, T Suzuki… - Archives of Biochemistry …, 1999 - Elsevier
The antioxidative mechanisms of catechins were studied by investigating products
generated at the first stages by 2, 2′-azobis (2-aminopropane) hydrochloride (AAPH) …

Chemical studies on antioxidant mechanism of tea catechins: analysis of radical reaction products of catechin and epicatechin with 2, 2-diphenyl-1-picrylhydrazyl

S Sang, X Cheng, RE Stark, RT Rosen, CS Yang… - Bioorganic & medicinal …, 2002 - Elsevier
Tea catechins, an important class of polyphenols, have been shown to have wide spectrum
of antitumor activity believed to be due mainly to their antioxidative effect. In this study, the …

Identification of Oxidation Products of (−)-Epigallocatechin Gallate and (−)-Epigallocatechin with H2O2

N Zhu, TC Huang, Y Yu, EJ LaVoie… - Journal of agricultural …, 2000 - ACS Publications
(−)-Epigallocatechin gallate (EGCG) and (−)-epigallocatechin (EGC) are two important
antioxidants in tea. They also display some antitumor activities, and these activities are …

ESR study on the structure–antioxidant activity relationship of tea catechins and their epimers

Q Guo, B Zhao, S Shen, J Hou, J Hu, W Xin - Biochimica et Biophysica Acta …, 1999 - Elsevier
The purpose of this study is to examine the relationship between the free radical scavenging
activities and the chemical structures of tea catechins ((−)-epigallocatechin gallate …

Identification of reaction products of (−)-epigallocatechin,(−)-epigallocatechin gallate and pyrogallol with 2, 2-diphenyl-1-picrylhydrazyl radical

N Zhu, M Wang, GJ Wei, JK Lin, CS Yang, CT Ho - Food Chemistry, 2001 - Elsevier
Catechins, the major constituents of tea, have been shown to have powerful antioxidant and
antitumor activity. In this study, the radical scavenging behavior of catechins on 2, 2-diphenyl …

Targeted acylation for all the hydroxyls of (+)-catechin and evaluation of their individual contribution to radical scavenging activity

S Hong, S Liu - Food Chemistry, 2016 - Elsevier
The reactivity profile of all the hydroxyl groups in (+)-catechin towards acylation and their
respective contribution to radical scavenging activity were systematically explored in this …

Scavenging effect of tea catechins and their epimers on superoxide anion radicals generated by a hypoxanthine and xanthine oxidase system

T Unno, A Sugimoto, T Kakuda - Journal of the Science of Food …, 2000 - Wiley Online Library
Catechins are a major group of polyphenolic compounds contained in abundance in green
tea. Using electron spin resonance spectroscopy along with a spin‐trapping agent, the …