
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...
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http://en.wikipedia.org/wiki/Fisetin

• (n.) A yellow crystalline substance extracted from fustet, and regarded as its essential coloring principle; -- called also fisetic acid.
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http://thinkexist.com/dictionary/meaning/fisetin/
Fis'e·tin noun [ German
fisett holz a species of fustic.]
(Chemistry) A yellow crystalline substance extracted from fustet, and regarded as its essential coloring principle; -- called also
fisetic acid .
Found on
http://www.encyclo.co.uk/webster/F/33
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