Prodelphinidin B3

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| ImageFile = Prodelphinidin B3.svg

| ImageSize = 250px

| ImageAlt = Chemical structure of prodelphinidin B3

| IUPACName = 2-(3,4-dihydroxyphenyl)-8-[3,5,7-trihydroxy-2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-chromen-4-yl]-3,4-dihydro-2H-chromene-3,5,7-triol

| OtherNames = gallocatechin-(4α→8)-catechin
GC-(4,8)-C
Dimer GC-C

|Section1={{Chembox Identifiers

| CASNo = 78362-05-7

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = YKF63X6RDD

| ChemSpiderID = 35014448

| PubChem = 13831061

| SMILES = C1C(C(OC2=C1C(=CC(=C2C3C(C(OC4=CC(=CC(=C34)O)O)C5=CC(=C(C(=C5)O)O)O)O)O)O)C6=CC(=C(C(=C6))O)O)O

| StdInChI=1S/C30H26O13/c31-12-6-17(35)23-22(7-12)42-29(11-4-19(37)26(40)20(38)5-11)27(41)25(23)24-18(36)9-15(33)13-8-21(39)28(43-30(13)24)10-1-2-14(32)16(34)3-10/h1-7,9,21,25,27-29,31-41H,8H2

| StdInChIKey = ZYDDITZPGFXQSD-UHFFFAOYSA-N

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|Section2={{Chembox Properties

| C = 30 | H = 26 | O = 13

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|Section3={{Chembox Hazards

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Prodelphinidin B3 is a prodelphinidin dimer found in food products such as barley{{Cite journal|pmid=20420318|year=2010|last1=Klausen|first1=K|last2=Mortensen|first2=AG|last3=Laursen|first3=B|last4=Haselmann|first4=KF|last5=Jespersen|first5=BM|last6=Fomsgaard|first6=IS|title=Phenolic compounds in different barley varieties: Identification by tandem mass spectrometry (QStar) and NMR; quantification by liquid chromatography triple quadrupole-linear ion trap mass spectrometry (Q-Trap)|volume=5|issue=3|pages=407–14|journal=Natural Product Communications|doi=10.1177/1934578X1000500314|s2cid=45699900|doi-access=free}}{{Cite journal|doi=10.1021/jf060974w|title=Phenolic Compounds of Barley Grain and Their Implication in Food Product Discoloration|year=2006|last1=Quinde-Axtell|first1=Zory|last2=Baik|first2=Byung-Kee|journal=Journal of Agricultural and Food Chemistry|volume=54|issue=26|pages=9978–84|pmid=17177530}} and beer, in fruits and pod vegetables. It can also be found in pomegranate peels.{{Cite journal|doi=10.1179/135100002125000172|title=Antioxidant properties of gallocatechin and prodelphinidins from pomegranate peel|year=2002|last1=Plumb|first1=G. W.|last2=De Pascual-Teresa|first2=S.|last3=Santos-Buelga|first3=C.|last4=Rivas-Gonzalo|first4=J. C.|last5=Williamson|first5=G.|journal=Redox Report|volume=7|pages=41–6|pmid=11981454|issue=1|doi-access=}}

It can also be synthesized.{{Cite journal|doi=10.1002/j.2050-0416.1986.tb04409.x|title=Direct Synthesis of the Barley Proanthocyanidins Prodelphinidin B3, Prodelphinidin C2 and Two Trimeric Proanthocyanidins with a Mixed Prodelphinidin-Procyanidin Stereochemistry|year=1986|last1=Delcour|first1=Jan A.|last2=Vercruysse|first2=Sabine A. R.|journal=Journal of the Institute of Brewing|volume=92|issue=3|pages=244|doi-access=}}