2005•HeterocyclesOpen access

The Structural Variation in the Incubation Products of (-)-Epigallocatechin Gallate in Neutral Solution Suggests Its Breakdown Pathways

Tsutomu Hatano, Takayo Ohyabu, Takashi Yoshida

Abstract

Three new compounds, in addition to previously reported compounds, were isolated from a product mixture obtained on incubating (-)-epigallocatechin gallate (EGCG) in neutral solution. The products were two monomeric (EGCG-MOx-M3 and EGCG-MOx-M4) and one dimeric (EGCG-MOx-D4) structure involving the flavan skeleton. Possible oxidation-reduction pathways producing drastic changes in the structure of EGCG were presented based on the structures of the breakdown products.

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Key concepts: Chemistry, Gallate, Epigallocatechin gallate, Flavan, Monomer, Incubation, MOX fuel, Stereochemistry