Neoflavonoids are a class of polyphenolic compounds. While

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 (in the narrow sense) have the 2-phenylchromen-4-one backbone, neoflavonoids have the 4-phenylchromen backbone with no hydroxyl group substitution at position 2.

Types

Neoflavonoids include 4-arylcoumarins (neoflavones), 4-arylchromanes, dalbergiones and dalbergiquinols. * Neoflavones are derived from the 4-phenylcoumarin (or 4-aryl-

coumarin Coumarin () or 2''H''-chromen-2-one is an aromatic organic chemical compound with formula . Its molecule can be described as a benzene molecule with two adjacent hydrogen atoms replaced by a lactone-like chain , forming a second six-membered ...

) backbone (C₁₅H₁₂O₂). The first neoflavone isolated from natural sources was calophyllolide from '' Calophyllum inophyllum'' seeds (1951). It is also known to found in bark and timber of Sri Lankan endemic plant '' Mesua thwaitesii''. * Neoflavenes possess the 4-phenylchromen backbone (C₁₅H₁₀O₂). Dalbergichromene, extracted from the stem-bark and heartwood of ''

Dalbergia sissoo ''Dalbergia sissoo'', known commonly as North Indian rosewood or ''shisham'', is a fast-growing, hardy, deciduous rosewood tree native to the Indian subcontinent and southern Iran. ''D. sissoo'' is a large, crooked tree with long, leathery le ...

'', is an example of such compounds

Other examples

* Coutareagenin (5-hydroxy-7-methoxy-4-(3,4-dihydroxyphenyl)-2H-benzo-1-pyran-2-on) found in '' Hintonia latiflora'' * Dalbergin * Nivetin isolated from '' Echinops niveus''

References

External links

{{Flavonoids