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. 2021 Jan 29;26(3):713. doi: 10.3390/molecules26030713

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Overview of the general structure of anthocyanins and formation of pyroanthocyanins, representing their coloration in wine acidic medium. C.T.: Condensed tannins. Adapted [113,114].