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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 (https://creativecommons.org/licenses/by/4.0/).
Chemical structures of some phytochemical polyphenol antioxidants featuring a basic phenolic (benzene) ring with two or more hydroxyl (OH) groups. These bioactive compounds act as antioxidants and are recognized as modulators of epigenetic gene expression regulation.