Record Information
Version1.0
Creation Date2016-09-30 22:35:22 UTC
Update Date2020-05-11 20:47:52 UTC
BMDB IDBMDB0000715
Secondary Accession Numbers
  • BMDB00715
Metabolite Identification
Common NameKynurenic acid
DescriptionKynurenic acid, also known as kynurenic acid or kynurenic acid, belongs to the class of organic compounds known as quinoline carboxylic acids. These are quinolines in which the quinoline ring system is substituted by a carboxyl group at one or more positions. Kynurenic acid exists as a solid, possibly soluble (in water), and an extremely weak basic (essentially neutral) compound (based on its pKa) molecule. Kynurenic acid exists in all eukaryotes, ranging from yeast to humans. In cattle, kynurenic acid is involved in the metabolic pathway called the tryptophan metabolism pathway. Kynurenic acid is a potentially toxic compound.
Structure
Thumb
Synonyms
ValueSource
4-Hydroxy-2-chinolincarbonsaeureChEBI
4-Hydroxy-2-quinolinecarboxylic acidChEBI
4-Hydroxyquinaldic acidChEBI
4-Hydroxyquinaldinic acidChEBI
KynurenateChEBI
KynurensaeureChEBI
4-Hydroxy-2-quinolinecarboxylateGenerator
4-HydroxyquinaldateGenerator
4-HydroxyquinaldinateGenerator
2-Carboxy-4-hydroxyquinolineHMDB
4-Hydroxy-quinaldateHMDB
4-Hydroxy-quinaldic acidHMDB
4-Hydroxyquinoline-2-carboxylateHMDB
4-Hydroxyquinoline-2-carboxylic acidHMDB
Quinurenic acidHMDB
Acid, kynurenicMeSH, HMDB
Chemical FormulaC10H7NO3
Average Molecular Weight189.1675
Monoisotopic Molecular Weight189.042593095
IUPAC Name4-oxo-1,4-dihydroquinoline-2-carboxylic acid
Traditional Nameacid, kynurenic
CAS Registry Number492-27-3
SMILES
OC(=O)C1=CC(=O)C2=CC=CC=C2N1
InChI Identifier
InChI=1S/C10H7NO3/c12-9-5-8(10(13)14)11-7-4-2-1-3-6(7)9/h1-5H,(H,11,12)(H,13,14)
InChI KeyHCZHHEIFKROPDY-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as quinoline carboxylic acids. These are quinolines in which the quinoline ring system is substituted by a carboxyl group at one or more positions.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassQuinolines and derivatives
Sub ClassQuinoline carboxylic acids
Direct ParentQuinoline carboxylic acids
Alternative Parents
Substituents
  • Quinoline-2-carboxylic acid
  • Dihydroquinolone
  • Dihydroquinoline
  • Pyridine carboxylic acid
  • Pyridine carboxylic acid or derivatives
  • Pyridine
  • Benzenoid
  • Heteroaromatic compound
  • Vinylogous amide
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Azacycle
  • Carboxylic acid derivative
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Organic oxygen compound
  • Organic nitrogen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Ontology
StatusExpected but not Quantified
Origin
  • Endogenous
BiofunctionNot Available
ApplicationNot Available
Cellular locations
  • Cytoplasm
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point280 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP1.16ALOGPS
logP1.58ChemAxon
logS-2.3ALOGPS
pKa (Strongest Acidic)3.17ChemAxon
pKa (Strongest Basic)-4.4ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area66.4 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity52.32 m³·mol⁻¹ChemAxon
Polarizability18.05 ųChemAxon
Number of Rings2ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash Key
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (Non-derivatized)splash10-0159-1985000000-f1c74ffc481c3d0faaa2View in MoNA
GC-MSGC-MS Spectrum - GC-MS (2 TMS)splash10-0159-3895000000-6ba2750c5a9d9754abccView in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0159-0498000000-3db9df2c3d8456d7ba63View in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0159-1985000000-f1c74ffc481c3d0faaa2View in MoNA
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-0159-3895000000-6ba2750c5a9d9754abccView in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0159-1895000000-e25b66b0b42d1928cc67View in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-02ga-1900000000-8c67ab2acdc02b88af2bView in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-00di-9740000000-a7c5c056d48055e0d44fView in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableView in JSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (TMS_1_2) - 70eV, PositiveNot AvailableView in JSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (TBDMS_1_1) - 70eV, PositiveNot AvailableView in JSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (TBDMS_1_2) - 70eV, PositiveNot AvailableView in JSpectraViewer
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-000i-0900000000-7a5c54ced5b83f291e67View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-0006-0900000000-e6b451ee354ed2717160View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-000i-9500000000-887e5157431b2908f31eView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-0006-1900000000-06f7059894cc245cb344View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Negativesplash10-0006-0900000000-89a88f44f08b8b68d5c1View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-qTof , Positivesplash10-014l-0900000000-3a256522dd8694fe04c0View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-000f-0900000000-a4b194b85fef656b9b65View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-0006-0900000000-7862c532805b6036dc67View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-0006-0900000000-5fe3171fdaece30b78c8View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-0006-0900000000-df3b5b36289798800ad8View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-0006-0900000000-d4c11672b9479b2cd4b6View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-0006-0900000000-89a88f44f08b8b68d5c1View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Linear Ion Trap , negativesplash10-0006-0900000000-9c26ffa9c04aa03d60f5View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Linear Ion Trap , negativesplash10-0006-0900000000-6a8662ef19d900499a55View in MoNA
LC-MS/MSLC-MS/MS Spectrum - , negativesplash10-0006-0900000000-d69a430b0eb34f38ad54View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-0006-0900000000-d0ef7c769d4985e85667View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-01ox-0900000000-2a593c8017254be4a387View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-01ox-0900000000-59f3559c0b95c9411d2cView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-02tc-0900000000-57dbbfb8e12c60951d77View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0006-0900000000-878dcda0ee5ec971fa72View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0006-0900000000-92fe5294ec4a771f14e0View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0006-1900000000-fa8b36fb6db8e403b711View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-000i-0900000000-9cede81ef6dfc45f5f7aView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-000f-0900000000-0d5cf046565b518442d5View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-2900000000-2c420ff1e59666527005View in MoNA
1D NMR1H NMR Spectrum (1D, 500 MHz, H2O, experimental)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 400 MHz, DMSO-d6, experimental)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, D2O, experimental)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, D2O, experimental)Not AvailableView in JSpectraViewer
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)Not AvailableView in JSpectraViewer
Biological Properties
Cellular Locations
  • Cytoplasm
Biospecimen Locations
  • Brain
  • Epidermis
  • Fibroblasts
  • Placenta
  • Prostate Tissue
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BrainExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
EpidermisExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
FibroblastsExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
PlacentaExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Prostate TissueExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Abnormal Concentrations
Not Available
HMDB IDHMDB0000715
DrugBank IDDB11937
Phenol Explorer Compound IDNot Available
FooDB IDFDB022200
KNApSAcK IDC00026453
Chemspider ID3712
KEGG Compound IDC01717
BioCyc IDKYNURENATE
BiGG ID38234
Wikipedia LinkKynurenic_acid
METLIN ID5683
PubChem Compound3845
PDB IDNot Available
ChEBI ID18344
References
Synthesis ReferenceStone, T. W. Development and therapeutic potential of kynurenic acid and kynurenine derivatives for neuroprotection. Trends in Pharmacological Sciences (2000), 21(4), 149-154.
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available