Flavanonol

The flavanonols (with two "o"s a.k.a. 3-hydroxyflavanone or 2,3-dihydroflavonol) are a class of that use the 3-hydroxy-2,3-dihydro-2-phenylchromen-4-one (IUPAC name) backbone.

Some examples include:

• Taxifolin (or Dihydroquercetin)
• Aromadedrin (or Dihydrokaempferol)
• Engeletin (or Dihydrokaempferol-3-rhamnoside)

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Metabolism

• Flavanone 3-dioxygenase
• Flavonol synthase
• Dihydroflavonol 4-reductase

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Glycosides Glycosides (chrysandroside A and chrysandroside B) can be found in the roots of Gordonia chrysandra. Xeractinol, a dihydroflavonol C-glucoside, can be isolated from the leaves of Paepalanthus argenteus var. argenteus.

Dihydro-flavonol glycosides (astilbin, neoastilbin, isoastilbin, neoisoastilbin, (2 R, 3 R)-taxifolin-3'- O-β-D-pyranoglucoside) have been identified in the rhizome of Smilax glabra.

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