柿 Polyphenol oligomer

An object of the present invention is to provide a polyphenol oligomer that dramatically improves pharmacological activity while maintaining good absorbability when taken orally. The pyrogallol ratio of ring B is 70 to 90%, the galloylation ratio is 40 to 70%, and contains epigallocatechin-3-O-gallate trimer. [Selection figure] None