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Record Information
Version5.0
StatusExpected but not Quantified
Creation Date2012-09-11 22:54:21 UTC
Update Date2022-03-07 02:55:26 UTC
HMDB IDHMDB0037655
Secondary Accession Numbers
  • HMDB37655
Metabolite Identification
Common NameProanthocyanidin A2
DescriptionProanthocyanidin A2, also known as ec-(4b,8)(2b,7)-ec or procyanidin A2, 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''. Proanthocyanidin A2 is a secondary metabolite. Secondary metabolites are metabolically or physiologically non-essential metabolites that may serve a role as defense or signalling molecules. In some cases they are simply molecules that arise from the incomplete metabolism of other secondary metabolites. Based on a literature review a significant number of articles have been published on Proanthocyanidin A2.
Structure
Thumb
Synonyms
ValueSource
Epicatechin-(2beta->7,4beta->8)-epicatechinChEBI
Epicatechin-(2b->7,4b->8)-epicatechinGenerator
Epicatechin-(2β->7,4β->8)-epicatechinGenerator
(+)-Proanthocyanidin a2HMDB
EC-(4b,8)(2b,7)-ecHMDB
Proanthocyanidin a-2HMDB
Procyanidin a2HMDB
Procyanidin dimer a2HMDB
ProcyanidoepicatechinHMDB
Procyanidol a2HMDB
Chemical FormulaC30H24O12
Average Molecular Weight576.51
Monoisotopic Molecular Weight576.126776213
IUPAC Name(1R,5R,6R,13S,21R)-5,13-bis(3,4-dihydroxyphenyl)-4,12,14-trioxapentacyclo[11.7.1.0²,¹¹.0³,⁸.0¹⁵,²⁰]henicosa-2(11),3(8),9,15(20),16,18-hexaene-6,9,17,19,21-pentol
Traditional Name(1R,5R,6R,13S,21R)-5,13-bis(3,4-dihydroxyphenyl)-4,12,14-trioxapentacyclo[11.7.1.0²,¹¹.0³,⁸.0¹⁵,²⁰]henicosa-2(11),3(8),9,15(20),16,18-hexaene-6,9,17,19,21-pentol
CAS Registry Number41743-41-3
SMILES
O[C@@H]1CC2=C(O[C@@H]1C1=CC=C(O)C(O)=C1)C1=C(O[C@@]3(OC4=C([C@H]1[C@H]3O)C(O)=CC(O)=C4)C1=CC(O)=C(O)C=C1)C=C2O
InChI Identifier
InChI=1S/C30H24O12/c31-13-7-20(37)24-22(8-13)41-30(12-2-4-16(33)19(36)6-12)29(39)26(24)25-23(42-30)10-17(34)14-9-21(38)27(40-28(14)25)11-1-3-15(32)18(35)5-11/h1-8,10,21,26-27,29,31-39H,9H2/t21-,26-,27-,29-,30+/m1/s1
InChI KeyNSEWTSAADLNHNH-LSBOWGMISA-N
Chemical Taxonomy
Description 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''.
KingdomOrganic compounds
Super ClassPhenylpropanoids and polyketides
ClassFlavonoids
Sub ClassBiflavonoids and polyflavonoids
Direct ParentBiflavonoids and polyflavonoids
Alternative Parents
Substituents
  • A-type proanthocyanidin
  • Bi- and polyflavonoid skeleton
  • Proanthocyanidin
  • Catechin
  • Pyranoflavonoid
  • Flavan-3-ol
  • Hydroxyflavonoid
  • 3'-hydroxyflavonoid
  • 7-hydroxyflavonoid
  • 5-hydroxyflavonoid
  • 4'-hydroxyflavonoid
  • 3-hydroxyflavonoid
  • Flavan
  • Pyranochromene
  • Chromane
  • 1-benzopyran
  • Benzopyran
  • Catechol
  • Alkyl aryl ether
  • 1-hydroxy-2-unsubstituted benzenoid
  • Phenol
  • Ketal
  • 1-hydroxy-4-unsubstituted benzenoid
  • Benzenoid
  • Monocyclic benzene moiety
  • Secondary alcohol
  • Polyol
  • Acetal
  • Organoheterocyclic compound
  • Oxacycle
  • Ether
  • Hydrocarbon derivative
  • Alcohol
  • Organic oxygen compound
  • Organooxygen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
Role
Physical Properties
StateSolid
Experimental Molecular Properties
PropertyValueReference
Melting Point300 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
Predicted Chromatographic Properties
Spectra
Biological Properties
Cellular Locations
  • Membrane
Biospecimen LocationsNot Available
Tissue LocationsNot Available
Pathways
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDFDB016778
KNApSAcK IDC00002934
Chemspider ID110541
KEGG Compound IDC10237
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkProanthocyanidin_A2
METLIN IDNot Available
PubChem Compound124025
PDB IDNot Available
ChEBI ID28472
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDrw1699221
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. (). Yannai, Shmuel. (2004) Dictionary of food compounds with CD-ROM: Additives, flavors, and ingredients. Boca Raton: Chapman & Hall/CRC.. .