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pyranoanthocyanin
The pyranoanthocyanins are a type of pyranoflavonoids. They are chemical compounds formed in red wines by yeast during fermentation processes or during controlled oxygenation processes during the aging of wine. The different classes of pyranoanthocyanins are carboxypyranoanthocyanins, methylpyranoanthocyanins, pyranoanthocyanin-flavanols, pyranoanthocyanin-phenols, portisins, oxovitisins and pyranoanthocyanin dimers; their general structure includes an additional ring (formed between the OH group at C-5 and the C-4 of the anthocyanin pyranic ring) that may have different substituents linked directly at C-10.
== Examples ==
* Carboxypyranoanthocyanidins, can be considered markers of microoxygenation techniques
* Hydroxyphenyl-pyranoanthocyanins
* Vitisin A and B〔
* Pinotins
* Portosins (vinylpyranoanthocyanins)
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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