Proanthocyanidin B2

Procyanidin B2

Names
IUPAC name (2R,2ʼR,3R,3ʼR,4R)-2,2ʼ-bis(3,4-dihydroxyphenyl)-3,3ʼ,4,4ʼ-tetrahydro-2H,2ʼH-4,8ʼ-bichromene-3,3ʼ,5,5ʼ,7,7ʼ-hexol
Other names Procyanidin-B2 (−)-Epicatechin-(4β→8)-(−)-epicatechin
Identifiers
CAS Number	29106-49-8
3D model (JSmol)	Interactive image
ChEBI	CHEBI:75632
ChemSpider	109417
PubChem CID	122738
InChI InChI=1S/C30H26O12/c31-13-7-20(37)24-23(8-13)41-29(12-2-4-16(33)19(36)6-12)27(40)26(24)25-21(38)10-17(34)14-9-22(39)28(42-30(14)25)11-1-3-15(32)18(35)5-11/h1-8,10,22,26-29,31-40H,9H2/t22-,26-,27-,28-,29-/m1/s1 Key: XFZJEEAOWLFHDH-NFJBMHMQSA-N
SMILES O[C@@H]1Cc2c(O)cc(O)c([C@@H]3[C@@H](O)[C@H](Oc4cc(O)cc(O)c34)c3ccc(O)c(O)c3)c2O[C@@H]1c1ccc(O)c(O)c1
Properties
Chemical formula	C30H26O12
Molar mass	578.52 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

Procyanidin B2 is a B type proanthocyanidin. Its structure is (−)-Epicatechin-(4β→8)-(−)-epicatechin.

Procyanidin B2 can be found in Cinchona pubescens (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), in the apple, and in Ecdysanthera utilis.

Procyanidin B2 can be converted into procyanidin A2 by radical oxidation using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals under neutral conditions.

Procyanidin B2 has been shown to inhibit the formation of the advanced glycation end-products pentosidine, carboxymethyllysine (CML), and methylglyoxal (MGO).