The flavanonols (with two "o"s a.k.a. 3-hydroxyflavanone or 2,3-dihydroflavonol) are a class of

flavonoid Flavonoids (or bioflavonoids; from the Latin word ''flavus'', meaning yellow, their color in nature) are a class of polyphenolic secondary metabolites found in plants, and thus commonly consumed in the diets of humans. Chemically, flavonoids ...

s that use the 3-hydroxy-2,3-dihydro-2-phenylchromen-4-one (IUPAC name) backbone. Some examples include: * Taxifolin (or Dihydroquercetin) *

Aromadedrin Aromadendrin (aromodendrin or dihydrokaempferol) is a flavanonol, a type of flavonoid. It can be found in the wood of '' Pinus sibirica''. Metabolism The enzyme dihydrokaempferol 4-reductase uses ''cis''-3,4-leucopelargonidin and NADP+ to pr ...

(or Dihydrokaempferol) *

Engeletin Engeletin is a flavanonol rhamnoside, a phenolic compound found in wine and isolated from the bark of ''Hymenaea martiana''. See also * Phenolic compounds in wine The phenolic content in wine refers to the phenolic compounds—natural phenol a ...

(or Dihydrokaempferol-3-rhamnoside)

Metabolism

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

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 Astilbin is a flavanonol, a type of flavonoid. Astilbin is the (2R-trans)-isomer; neoisoastilbin is the (2S-cis)-isomer and isoastilbin is the (2R-cis)-isomer. Natural occurrences Astilbin can be found in St John's wort (''Hypericum perforatum'' ...

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

References

{{Aromatic-stub