1.0 2010-04-08 22:13:15 UTC 2025-11-19 01:57:06 UTC FDB017715 Procyanidin C2 Procyanidin c2, also known as C-(4,8)-C-(4,8)-C or procyanidin trimer c2, is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Procyanidin c2 is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Procyanidin c2 can be found in barley, beer, and common grape, which makes procyanidin c2 a potential biomarker for the consumption of these food products. [Catechin(4a->8)]2catechin C-(4,8)-C-(4,8)-C Procyanidin C2 Procyanidin trimer C2 C45H38O18 866.781 866.205814384 (2R,3S,4R)-2-(3,4-dihydroxyphenyl)-8-[(2R,3S,4S)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-1-benzopyran-4-yl]-4-[(2R,3S)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-1-benzopyran-8-yl]-3,4-dihydro-2H-1-benzopyran-3,5,7-triol (2R,3S,4R)-2-(3,4-dihydroxyphenyl)-8-[(2R,3S,4S)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-1-benzopyran-4-yl]-4-[(2R,3S)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-1-benzopyran-8-yl]-3,4-dihydro-2H-1-benzopyran-3,5,7-triol 37064-31-6 O[C@H]1CC2=C(O)C=C(O)C([C@H]3[C@H](O)[C@H](OC4=C([C@H]5[C@H](O)[C@H](OC6=CC(O)=CC(O)=C56)C5=CC(O)=C(O)C=C5)C(O)=CC(O)=C34)C3=CC(O)=C(O)C=C3)=C2O[C@@H]1C1=CC(O)=C(O)C=C1 InChI=1S/C45H38O18/c46-18-10-27(54)33-32(11-18)61-42(16-2-5-21(48)25(52)8-16)39(59)37(33)35-29(56)14-30(57)36-38(40(60)43(63-45(35)36)17-3-6-22(49)26(53)9-17)34-28(55)13-23(50)19-12-31(58)41(62-44(19)34)15-1-4-20(47)24(51)7-15/h1-11,13-14,31,37-43,46-60H,12H2/t31-,37-,38+,39-,40-,41+,42+,43+/m0/s1 MOJZMWJRUKIQGL-WNCKYJNFSA-N belongs to the class of organic compounds known as biflavonoids and polyflavonoids. These are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Biflavonoids and polyflavonoids Organic compounds Phenylpropanoids and polyketides Flavonoids Biflavonoids and polyflavonoids Aromatic heteropolycyclic compounds 1-benzopyrans 1-hydroxy-2-unsubstituted benzenoids 1-hydroxy-4-unsubstituted benzenoids 3'-hydroxyflavonoids 3-hydroxyflavonoids 4'-hydroxyflavonoids 5-hydroxyflavonoids 7-hydroxyflavonoids Alkyl aryl ethers B-type proanthocyanidins Benzene and substituted derivatives C-type proanthocyanidins Catechins Catechols Hydrocarbon derivatives Oxacyclic compounds Polyols Secondary alcohols 1-benzopyran 1-hydroxy-2-unsubstituted benzenoid 1-hydroxy-4-unsubstituted benzenoid 3'-hydroxyflavonoid 3-hydroxyflavonoid 4'-hydroxyflavonoid 5-hydroxyflavonoid 7-hydroxyflavonoid Alcohol Alkyl aryl ether Aromatic heteropolycyclic compound B-type proanthocyanidin Benzenoid Benzopyran Bi- and polyflavonoid skeleton C-type proanthocyanidin Catechin Catechol Chromane Ether Flavan Flavan-3-ol Hydrocarbon derivative Hydroxyflavonoid Monocyclic benzene moiety Organic oxygen compound Organoheterocyclic compound Organooxygen compound Oxacycle Phenol Polyol Proanthocyanidin Secondary alcohol hydroxyflavan polyphenol proanthocyanidin logp 3.38 ALOGPS logs -3.55 ALOGPS solubility 2.47e-01 g/l ALOGPS logp 4.44 ChemAxon pka_strongest_acidic 8.64 ChemAxon pka_strongest_basic -5.2 ChemAxon iupac (2R,3S,4R)-2-(3,4-dihydroxyphenyl)-8-[(2R,3S,4S)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-1-benzopyran-4-yl]-4-[(2R,3S)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-1-benzopyran-8-yl]-3,4-dihydro-2H-1-benzopyran-3,5,7-triol ChemAxon average_mass 866.781 ChemAxon mono_mass 866.205814384 ChemAxon smiles O[C@H]1CC2=C(O)C=C(O)C([C@H]3[C@H](O)[C@H](OC4=C([C@H]5[C@H](O)[C@H](OC6=CC(O)=CC(O)=C56)C5=CC(O)=C(O)C=C5)C(O)=CC(O)=C34)C3=CC(O)=C(O)C=C3)=C2O[C@@H]1C1=CC(O)=C(O)C=C1 ChemAxon formula C45H38O18 ChemAxon inchi InChI=1S/C45H38O18/c46-18-10-27(54)33-32(11-18)61-42(16-2-5-21(48)25(52)8-16)39(59)37(33)35-29(56)14-30(57)36-38(40(60)43(63-45(35)36)17-3-6-22(49)26(53)9-17)34-28(55)13-23(50)19-12-31(58)41(62-44(19)34)15-1-4-20(47)24(51)7-15/h1-11,13-14,31,37-43,46-60H,12H2/t31-,37-,38+,39-,40-,41+,42+,43+/m0/s1 ChemAxon inchikey MOJZMWJRUKIQGL-WNCKYJNFSA-N ChemAxon polar_surface_area 331.14 ChemAxon refractivity 219.02 ChemAxon polarizability 86.02 ChemAxon rotatable_bond_count 5 ChemAxon acceptor_count 18 ChemAxon donor_count 15 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 100956 Specdb::MsMs 100957 Specdb::MsMs 100958 Specdb::MsMs 166434 Specdb::MsMs 166435 Specdb::MsMs 166436 Specdb::MsMs 3606206 Specdb::MsMs 3606207 Specdb::MsMs 3606208 Specdb::MsMs 3606209 Specdb::MsMs 3606210 Specdb::MsMs 3606211 Barley Type 1 specific Hordeum vulgare 4513 Beer Type 2 specific 0.03 0.030000001 0.030000001 mg/100 g Common grape Type 1 specific Vitis vinifera 29760 0.0 0.0 0.0 mg/100 g Angiotensin converting enzyme inhibitor 18 An EC 3.4.15.* (peptidyl-dipeptidase) inhibitor that interferes with the action of peptidyl-dipeptidase A (EC 3.4.15.1). Anti-oxidant 502 A substance that opposes oxidation or inhibits reactions brought about by dioxygen or peroxides. In European countries, E-numbers for permitted antioxidant food additives are from E 300 to E 324.