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Class of chemical compounds / From Wikipedia, the free encyclopedia

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Polyphenols (/ˌpɒliˈfnl, -nɒl/) are a large family of naturally occurring organic compounds characterized by multiples of phenol units.[1] They are abundant in plants and structurally diverse.[1][2][3] Polyphenols include flavonoids, tannic acid, and ellagitannin, some of which have been used historically as dyes and for tanning garments.

Curcumin, a bright yellow component of turmeric (Curcuma longa) is a well-studied polyphenol.

Proposed structure of one of many plant-derived polyphenol that comprise tannic acid. Such compound are formed by esterification of phenylpropanoid-derived gallic acid to a monosaccharide (glucose) core.