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Chemical structures of the major green tea polyphenols. Structures shown: (1) Gallic acid, (2) (–)-gallocatechin, (3) (+)-catechin, (4) (–)-epigallocatechin, (5) (–)-epicatechin, (6) (–)-epigallocatechin gallate, (7) (–)-epicatechin gallate, (8) p-coumaroylquinic acid, and (9) (–)-gallocatechin gallate.
