Tannins
Complex tannins
Sub of tannins. These tannins are bound to a gallotannin or an ellagitanin.
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Condensed tannins/flavanotannins, so oligomeric procyanides and polymeric proanthocyanides
Sub of tannins. Polymerisations of flavan-3-ols. Some of this group are more likely to be classified as flavonoids.
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Ellagatannins
Sub of tannins. A more complicated tannin, which is not hydrolysable. This is the largest group of natural tannins.
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Gallotannins
Sub of tannins. Tanning agents based on gallic acid. Gallotannins are simple tannins that are hydrolyzable. Can burden the liver, kidneys and red blood cells and should therefore not be used…
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Tannins, general
Tannins probably protect the plant against infections and enemies, such as insects and herbivores.
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