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A Novel Black Tea Pigment and Two New Oxidation Products of Epigallocatechin-3- O -gallate

✍ Scribed by Tanaka, Takashi; Matsuo, Yosuke; Kouno, Isao

Book ID
127071205
Publisher
American Chemical Society
Year
2005
Tongue
English
Weight
167 KB
Volume
53
Category
Article
ISSN
0021-8561

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Theadibenzotropolone , a new type pigmen
Theadibenzotropolone , a new type pigment from enzymatic oxidation of (βˆ’)-epicatechin and (βˆ’)-epigallocatechin gallate and characterized from black tea using LC/MS/MS
✍ Shengmin Sang; Shiying Tian; Xiaofeng Meng; Ruth E. Stark; Robert T. Rosen; Chun πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 French βš– 299 KB

Theaflavins and thearubigins are major pigments of black tea. In the course of studies on the oxidation mechanism of tea polyphenols, a new type of tea pigment, theadibenzotropolone A, together with theaflavin 3-gallate were formed by the reaction of (-)-epicatechin (EC) and (-)-epigallocatechin gal