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Fisetin is a flavonol, a structurally distinct chemical substance that belongs to the flavonoid group of polyphenols. It can be found in many plants, where it serves as a colouring agent. Its chemical formula was first described by Austrian chemist Josef Herzig in 1891. Possible anti-aging, anti-inflammatory, anti-cancer, and anti-viral properties of fisetin are under active scientific investigation. |