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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2009-07-25 00:07:32 UTC
Update Date2021-09-14 15:40:56 UTC
HMDB IDHMDB0012798
Secondary Accession Numbers
  • HMDB12798
Metabolite Identification
Common Name5'-Carboxy-alpha-chromanol
Description5'-carboxy-alpha-tocopherol is a dehydrogenation carboxylate product of 5'-hydroxy-a-tocopherol by an unidentified microsomal enzyme(s) probably via an aldehyde intermediate. The tocopherols ( a-tocopherol , b-tocopherol ,r-tocopherol and d-tocopherol ) and their corresponding tocotrienols are synthesized by plants and have vitamin E antixoidant activity (see pathway vitamin E biosynthesis ). They differ in the number and location of methyl groups on the chromanol ring. The naturally occurring form of a-tocopherol is (2R,4'R,8'R)-a-tocopherol (synonym (R,R,R)-a-tocopherol). Synthetic a-tocopherols are a racemic mixture of eight different R and S stereoisomers. Only the 2R forms are recognized as meeting human requirements. The in vivo function of vitamin E is to scavenge peroxyl radicals via its phenolic (chromanol) hydroxyl group, thus protecting lipids against free radical-catalyzed peroxidation. The tocopheryl radical formed can then be reduced by reductants such as L-ascorbate. Other major products of a-tocopherol oxidation include α-tocopherylquinone and epoxy-a-tocopherols. The metabolites a-tocopheronic acid and its lactone, known as the Simon metabolites, are generally believed to be artefacts. In addition to these oxidation products, the other major class of tocopherol metabolites is the carboxyethyl-hydroxychromans.These metabolites are produced in significant amounts in response to excess vitamin E ingestion. Vitamin E is fat-soluble and its utilization requires intestinal fat absorption mechanisms. It is secreted from the intestine into the lymphatic system in chylomicrons which subsequently enter the plasma. Lipolysis of these chylomicrons can result in delivery of vitamin E to tissues, transfer to high-density lipoproteins (and subsequently to other lipoproteins via the phospholipid exchange protein), or retention in chylomicron remnants. These remnants are taken up by the liver. Natural (R,R,R)-α-tocopherol and synthetic 2R-α-tocopherols are then preferentially secreted from the liver into plasma as a result of the specificity of the α-tocopherol transfer protein. This protein, along with the metabolism of excess vitamin E in the liver and excretion into urine and bile, mediate the supply of a-tocopherol in plasma and tissues.
Structure
Data?1582753073
Synonyms
ValueSource
alpha-CMBHCMeSH
5'-Carboxy-alpha-tocopherolHMDB
5-[(2R)-6-Hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-1-benzopyran-2-yl]-2-methylpentanoateGenerator
Chemical FormulaC19H28O4
Average Molecular Weight320.4232
Monoisotopic Molecular Weight320.198759384
IUPAC Name5-[(2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-1-benzopyran-2-yl]-2-methylpentanoic acid
Traditional Name5-[(2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-1-benzopyran-2-yl]-2-methylpentanoic acid
CAS Registry NumberNot Available
SMILES
CC(CCC[C@]1(C)CCC2=C(O1)C(C)=C(C)C(O)=C2C)C(O)=O
InChI Identifier
InChI=1S/C19H28O4/c1-11(18(21)22)7-6-9-19(5)10-8-15-14(4)16(20)12(2)13(3)17(15)23-19/h11,20H,6-10H2,1-5H3,(H,21,22)/t11?,19-/m1/s1
InChI KeyQWPNLVBAEZJBMI-IMFVZPHKSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as 1-benzopyrans. These are organic aromatic compounds that 1-benzopyran, a bicyclic compound made up of a benzene ring fused to a pyran, so that the oxygen atom is at the 1-position.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassBenzopyrans
Sub Class1-benzopyrans
Direct Parent1-benzopyrans
Alternative Parents
Substituents
  • 1-benzopyran
  • Medium-chain fatty acid
  • Alkyl aryl ether
  • Branched fatty acid
  • Heterocyclic fatty acid
  • Hydroxy fatty acid
  • Methyl-branched fatty acid
  • Fatty acyl
  • Fatty acid
  • Benzenoid
  • Carboxylic acid derivative
  • Carboxylic acid
  • Ether
  • Oxacycle
  • Monocarboxylic acid or derivatives
  • Organic oxide
  • Hydrocarbon derivative
  • Carbonyl group
  • Organic oxygen compound
  • Organooxygen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External DescriptorsNot Available
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
RoleNot Available
Physical Properties
StateSolid
Experimental Molecular Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
PropertyValueSource
Water Solubility0.038 g/LALOGPS
logP4.16ALOGPS
logP5.31ChemAxon
logS-3.9ALOGPS
pKa (Strongest Acidic)4.3ChemAxon
pKa (Strongest Basic)-4.9ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area66.76 ŲChemAxon
Rotatable Bond Count5ChemAxon
Refractivity91.16 m³·mol⁻¹ChemAxon
Polarizability36.96 ųChemAxon
Number of Rings2ChemAxon
BioavailabilityYesChemAxon
Rule of FiveNoChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DarkChem[M+H]+176.48731661259
DarkChem[M-H]-173.30931661259
DeepCCS[M+H]+181.56830932474
DeepCCS[M-H]-179.2130932474
DeepCCS[M-2H]-213.33230932474
DeepCCS[M+Na]+189.03530932474
AllCCS[M+H]+179.332859911
AllCCS[M+H-H2O]+176.232859911
AllCCS[M+NH4]+182.232859911
AllCCS[M+Na]+183.032859911
AllCCS[M-H]-185.932859911
AllCCS[M+Na-2H]-186.332859911
AllCCS[M+HCOO]-186.932859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
5'-Carboxy-alpha-chromanolCC(CCC[C@]1(C)CCC2=C(O1)C(C)=C(C)C(O)=C2C)C(O)=O3783.0Standard polar33892256
5'-Carboxy-alpha-chromanolCC(CCC[C@]1(C)CCC2=C(O1)C(C)=C(C)C(O)=C2C)C(O)=O2572.5Standard non polar33892256
5'-Carboxy-alpha-chromanolCC(CCC[C@]1(C)CCC2=C(O1)C(C)=C(C)C(O)=C2C)C(O)=O2620.7Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
5'-Carboxy-alpha-chromanol,1TMS,isomer #1CC1=C(C)C2=C(CC[C@@](C)(CCCC(C)C(=O)O)O2)C(C)=C1O[Si](C)(C)C2586.7Semi standard non polar33892256
5'-Carboxy-alpha-chromanol,1TMS,isomer #2CC1=C(C)C2=C(CC[C@@](C)(CCCC(C)C(=O)O[Si](C)(C)C)O2)C(C)=C1O2490.7Semi standard non polar33892256
5'-Carboxy-alpha-chromanol,2TMS,isomer #1CC1=C(C)C2=C(CC[C@@](C)(CCCC(C)C(=O)O[Si](C)(C)C)O2)C(C)=C1O[Si](C)(C)C2561.8Semi standard non polar33892256
5'-Carboxy-alpha-chromanol,1TBDMS,isomer #1CC1=C(C)C2=C(CC[C@@](C)(CCCC(C)C(=O)O)O2)C(C)=C1O[Si](C)(C)C(C)(C)C2832.3Semi standard non polar33892256
5'-Carboxy-alpha-chromanol,1TBDMS,isomer #2CC1=C(C)C2=C(CC[C@@](C)(CCCC(C)C(=O)O[Si](C)(C)C(C)(C)C)O2)C(C)=C1O2765.8Semi standard non polar33892256
5'-Carboxy-alpha-chromanol,2TBDMS,isomer #1CC1=C(C)C2=C(CC[C@@](C)(CCCC(C)C(=O)O[Si](C)(C)C(C)(C)C)O2)C(C)=C1O[Si](C)(C)C(C)(C)C3023.7Semi standard non polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - 5'-Carboxy-alpha-chromanol GC-MS (Non-derivatized) - 70eV, Positivesplash10-0a59-5193000000-21a44421397f44e8ef102017-09-01Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - 5'-Carboxy-alpha-chromanol GC-MS (2 TMS) - 70eV, Positivesplash10-0092-9418400000-1183546d2d9264c18b032017-10-06Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - 5'-Carboxy-alpha-chromanol GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 10V, Positive-QTOFsplash10-0g4i-0739000000-ca7cf4a3acdfe05983532017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 20V, Positive-QTOFsplash10-014i-1911000000-87257705b965ee40a7b52017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 40V, Positive-QTOFsplash10-066r-3900000000-51c6445c30175ea5c8652017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 10V, Negative-QTOFsplash10-014i-0019000000-e48de0e905548411c0442017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 20V, Negative-QTOFsplash10-0i29-1798000000-b5d9e37b42b4c3fd98892017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 40V, Negative-QTOFsplash10-0r7j-3920000000-36465eb352f634a1d51b2017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 10V, Negative-QTOFsplash10-014i-0019000000-03b18204386c4c9d8bd42021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 20V, Negative-QTOFsplash10-016r-0395000000-2bf38f23f39a4fa971972021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 40V, Negative-QTOFsplash10-0a4r-0690000000-539dacc450e163bec4e12021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 10V, Positive-QTOFsplash10-0fi0-0096000000-6c33505488ad70d719252021-09-23Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 20V, Positive-QTOFsplash10-004j-0090000000-366d350d1a77109facef2021-09-23Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 5'-Carboxy-alpha-chromanol 40V, Positive-QTOFsplash10-014i-4920000000-158de22677ca15ece6b92021-09-23Wishart LabView Spectrum
Biological Properties
Cellular Locations
  • Membrane (predicted from logP)
Biospecimen Locations
  • Feces
Tissue LocationsNot Available
Pathways
Normal Concentrations
Not Available
Abnormal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothIron deficiency details
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothUlcerative colitis details
Associated Disorders and Diseases
Disease References
Iron deficiency
  1. Lee T, Clavel T, Smirnov K, Schmidt A, Lagkouvardos I, Walker A, Lucio M, Michalke B, Schmitt-Kopplin P, Fedorak R, Haller D: Oral versus intravenous iron replacement therapy distinctly alters the gut microbiota and metabolome in patients with IBD. Gut. 2017 May;66(5):863-871. doi: 10.1136/gutjnl-2015-309940. Epub 2016 Feb 4. [PubMed:26848182 ]
Ulcerative colitis
  1. Lee T, Clavel T, Smirnov K, Schmidt A, Lagkouvardos I, Walker A, Lucio M, Michalke B, Schmitt-Kopplin P, Fedorak R, Haller D: Oral versus intravenous iron replacement therapy distinctly alters the gut microbiota and metabolome in patients with IBD. Gut. 2017 May;66(5):863-871. doi: 10.1136/gutjnl-2015-309940. Epub 2016 Feb 4. [PubMed:26848182 ]
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDFDB029177
KNApSAcK IDNot Available
Chemspider ID35032548
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound53481524
PDB IDNot Available
ChEBI ID172549
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDNot Available
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available