Procyanidin B2 is a

B type proanthocyanidin B type proanthocyanidins are a specific type of proanthocyanidin, which are a class of flavanoids. They are oligomers of flavan-3-ols. Dimeric B type proanthocyanidins These molecules have the molecular formula C30H26O12 (molar mass : 578.52 g/m ...

. Its structure is (−)- Epicatechin-(4β→8)-(−)-epicatechin. Procyanidin B2 can be found in ''

Cinchona pubescens ''Cinchona pubescens'', also known as red cinchona and quina (Kina) ( ''Cascarilla, cinchona''; ''quina-do-amazonas, quineira''), is native to Central and South America. It is known as a medicinal plant for its bark's high quinine content- and h ...

'' (Chinchona: in the rind, bark, and cortex), in '' Cinnamomum verum'' (Ceylon cinnamon: in the rind, bark, and cortex), in '' Crataegus monogyna'' (Common hawthorn: in the flower and blossom), in '' Uncaria guianensis'' (Cat's claw: in the root), in '' Vitis vinifera'' (Common grape vine: in the leaf), in '' Litchi chinensis'' (litchi: in the pericarp),Immunomodulatory and anticancer activities of flavonoids extracted from litchi (Litchi chinensis Sonn.) pericarp. Mouming Zhao; Bao Yang; Jinshui Wang; Yang Liu; Limei Yu; Yueming Jiang, 2007
/ref> in the apple, and in ''

Ecdysanthera utilis ''Urceola micrantha'' is a plant species in the genus '' Urceola''. It is a shrub widespread across much of East Asia, Southeast Asia, and the Himalayas. In Taïwan, it is used in folk medicine as an analgesic, antiphlogistic and spasmolytic a ...

''. Procyanidin B2 can be converted into

procyanidin A2 Procyanidin A2 is an A type proanthocyanidin. It is found in avocado, chestnut, cranberry juice concentrate, lychee fruit pericarp, peanut The peanut (''Arachis hypogaea''), also known as the groundnut, goober (US), pindar (US) or monke ...

by radical oxidation using

1,1-diphenyl-2-picrylhydrazyl DPPH is a common abbreviation for the organic chemical compound 2,2-diphenyl-1-picrylhydrazyl. It is a dark-colored crystalline powder composed of stable free radical molecules. DPPH has two major applications, both in laboratory research: one is ...

(DPPH) radicals under neutral conditions. Procyanidin B2 has been shown to inhibit the formation of the advanced glycation end-products

pentosidine Pentosidine is a biomarker for advanced glycation endproducts, or AGEs. It is a well characterized and easily detected member of this large class of compounds. Background AGEs are biochemicals formed continuously under normal circumstances, but ...

, carboxymethyllysine (CML), and methylglyoxal (MGO).

References

Procyanidin dimers {{Aromatic-stub

See also

References