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Quercitrin

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Quer´cit`rin
n.1.(Chem.) A glucoside extracted from the bark of the oak (Quercus) as a bitter citron-yellow crystalline substance, used as a pigment and called quercitron.


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The composition from leaves contain 3-10% tannins (a mixture of catechins, gallotannins, plus cyaniding and delphinidin type proanthocyanidins), mainly hamamelitannin and hamamelose, catechins, mainly (+) catechin, (+) - catechin, (+) - epigallocatechin gallate; phenolic acids (caffeic and gallic acids; flavonoids such as kaempferol, quercetin, quercitrin and isoquercitrin, 0.
Concentration of rutin was increased more than 10 times, with production of quercitrin and one newly formed flavonoid during 48 h germination.
 
 
 
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