Aglycone: nm Aglycone is grape anthocyanin, a pigment that is part of the polyphenols contained in the skin of red or black grapes. Flavonoids, especially anthocyanins, are the only molecules in the plant kingdom capable of producing a wide range of colors. In addition, this pigment is notoriously sensitive to oxidation. For young wines with high acidity, it will give a robe with purplish tints. For older wines, the reflections will evolve...
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