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. 2012 Feb 7;17(2):1483–1519. doi: 10.3390/molecules17021483

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© 2012 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 license (http://creativecommons.org/licenses/by/3.0/).

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Scheme 4 — Formation mechanism of flavanyl/phenyl-vinylpyranoanthocyanin derived from carboxy-pyranoanthocyanins: (a) A type portisins (flavanyl-vinylpyranoanthocyanin); (b) B type portisins (phenyl-vinylpyranoanthocyanin) [96,103].