TY - JOUR
T1 - Characterization of the oxidation products of (-)-epigallocatechin gallate, a bioactive tea polyphenol, on incubation in neutral solution
AU - Hatano, Tsutomu
AU - Hori, Mami
AU - Kusuda, Miwako
AU - Ohyabu, Takayo
AU - Ito, Hideyuki
AU - Yoshida, Takashi
PY - 2004/7/1
Y1 - 2004/7/1
N2 - (-)-Epigallocatechin gallate (EGCG) (1) changes rapidly into various products in neutral solution containing trace amounts of metal ions as catalysts. In addition to theasinensins A (2) and D (3), (-)-gallocatechin gallate (4), and gallic acid, five products were isolated from a reaction mixture resulting from the incubation of 1. MS and NMR spectroscopic analyses of the products revealed two monomeric [EGCG-MOx-M1 (5) and M2 (6)], and three dimeric [EGCG-MOx-D1 (7), D2 (8) and D3 (9)] structures.
AB - (-)-Epigallocatechin gallate (EGCG) (1) changes rapidly into various products in neutral solution containing trace amounts of metal ions as catalysts. In addition to theasinensins A (2) and D (3), (-)-gallocatechin gallate (4), and gallic acid, five products were isolated from a reaction mixture resulting from the incubation of 1. MS and NMR spectroscopic analyses of the products revealed two monomeric [EGCG-MOx-M1 (5) and M2 (6)], and three dimeric [EGCG-MOx-D1 (7), D2 (8) and D3 (9)] structures.
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U2 - 10.3987/COM-04-10039
DO - 10.3987/COM-04-10039
M3 - Article
AN - SCOPUS:3142519649
SN - 0385-5414
VL - 63
SP - 1547
EP - 1554
JO - Heterocycles
JF - Heterocycles
IS - 7
ER -