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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2021-09-11 17:55:21 UTC
Update Date2021-09-26 23:13:23 UTC
HMDB IDHMDB0257186
Secondary Accession NumbersNone
Metabolite Identification
Common NameRetusin
DescriptionTetramethylquercetin, also known as retusin, belongs to the class of organic compounds known as 7-o-methylated flavonoids. These are flavonoids with methoxy groups attached to the C7 atom of the flavonoid backbone. Thus, tetramethylquercetin is considered to be a flavonoid. Tetramethylquercetin has been detected, but not quantified in, common oreganos (Origanum vulgare) and mandarin orange (clementine, tangerine). This could make tetramethylquercetin a potential biomarker for the consumption of these foods. Tetramethylquercetin 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 very few articles have been published on Tetramethylquercetin. This compound has been identified in human blood as reported by (PMID: 31557052 ). Retusin is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically Retusin is part of the human exposome. The exposome can be defined as the collection of all the exposures of an individual in a lifetime and how those exposures relate to health. An individual's exposure begins before birth and includes insults from environmental and occupational sources.
Structure
Thumb
Synonyms
ValueSource
2-(3,4-Dimethoxyphenyl)-5-hydroxy-3,7-dimethoxy-4H-1-benzopyran-4-oneChEBI
3,3',4',7-O-TetramethylquercetinChEBI
3,3',4',7-TetramethylquercetinChEBI
3,7,3',4'-TetramethylquercetinChEBI
Quercetin 3,3',4',7-tetramethyl etherChEBI
Quercetin 3,7,3',4'-tetramethyl etherChEBI
RetusinChEBI
RetusineChEBI
5-Hydroxy-3,7,3',4'-tetramethoxyflavoneMetaCyc, MeSH
3,7,3',4'-Tetra-O-methylquercetinMetaCyc
Chemical FormulaC19H18O7
Average Molecular Weight358.342
Monoisotopic Molecular Weight358.10525293
IUPAC Name2-(3,4-dimethoxyphenyl)-5-hydroxy-3,7-dimethoxy-4H-chromen-4-one
Traditional Nameretusin (flavonol)
CAS Registry NumberNot Available
SMILES
COC1=CC(O)=C2C(=O)C(OC)=C(OC2=C1)C1=CC=C(OC)C(OC)=C1
InChI Identifier
InChI=1S/C19H18O7/c1-22-11-8-12(20)16-15(9-11)26-18(19(25-4)17(16)21)10-5-6-13(23-2)14(7-10)24-3/h5-9,20H,1-4H3
InChI KeyHHGPYJLEJGNWJA-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as 7-o-methylated flavonoids. These are flavonoids with methoxy groups attached to the C7 atom of the flavonoid backbone.
KingdomOrganic compounds
Super ClassPhenylpropanoids and polyketides
ClassFlavonoids
Sub ClassO-methylated flavonoids
Direct Parent7-O-methylated flavonoids
Alternative Parents
Substituents
  • 3p-methoxyflavonoid-skeleton
  • 3-methoxyflavonoid-skeleton
  • 4p-methoxyflavonoid-skeleton
  • 7-methoxyflavonoid-skeleton
  • Hydroxyflavonoid
  • Flavone
  • 5-hydroxyflavonoid
  • 3-methoxychromone
  • Chromone
  • 1-benzopyran
  • Benzopyran
  • Dimethoxybenzene
  • O-dimethoxybenzene
  • Anisole
  • Phenoxy compound
  • Phenol ether
  • Methoxybenzene
  • 1-hydroxy-4-unsubstituted benzenoid
  • 1-hydroxy-2-unsubstituted benzenoid
  • Alkyl aryl ether
  • Pyranone
  • Monocyclic benzene moiety
  • Benzenoid
  • Pyran
  • Vinylogous acid
  • Heteroaromatic compound
  • Organoheterocyclic compound
  • Oxacycle
  • Ether
  • Organic oxide
  • Organic oxygen compound
  • Hydrocarbon derivative
  • Organooxygen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
RoleNot Available
Physical Properties
StateNot Available
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
logP3.31ALOGPS
logP2.71ChemAxon
logS-4.2ALOGPS
pKa (Strongest Acidic)8.36ChemAxon
pKa (Strongest Basic)-4.3ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count7ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area83.45 ŲChemAxon
Rotatable Bond Count5ChemAxon
Refractivity95.06 m³·mol⁻¹ChemAxon
Polarizability36.66 ųChemAxon
Number of Rings3ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DeepCCS[M+H]+185.96230932474
DeepCCS[M-H]-183.60430932474
DeepCCS[M-2H]-217.60830932474
DeepCCS[M+Na]+192.83730932474
AllCCS[M+H]+183.632859911
AllCCS[M+H-H2O]+180.332859911
AllCCS[M+NH4]+186.632859911
AllCCS[M+Na]+187.432859911
AllCCS[M-H]-186.832859911
AllCCS[M+Na-2H]-186.632859911
AllCCS[M+HCOO]-186.532859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
RetusinCOC1=CC(O)=C2C(=O)C(OC)=C(OC2=C1)C1=CC=C(OC)C(OC)=C14836.1Standard polar33892256
RetusinCOC1=CC(O)=C2C(=O)C(OC)=C(OC2=C1)C1=CC=C(OC)C(OC)=C13262.0Standard non polar33892256
RetusinCOC1=CC(O)=C2C(=O)C(OC)=C(OC2=C1)C1=CC=C(OC)C(OC)=C13135.8Semi standard non polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - Retusin GC-MS (Non-derivatized) - 70eV, Positivesplash10-004l-0419000000-8001f334e7bd21c106382021-09-23Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Retusin GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Retusin GC-MS (TMS_1_1) - 70eV, PositiveNot Available2021-11-05Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Retusin GC-MS (TBDMS_1_1) - 70eV, PositiveNot Available2021-11-05Wishart LabView Spectrum

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Retusin 10V, Positive-QTOFsplash10-0a4i-0009000000-95e43140d41719d302192016-08-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Retusin 20V, Positive-QTOFsplash10-0a4i-0009000000-577082fa366951f488db2016-08-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Retusin 40V, Positive-QTOFsplash10-01dr-2966000000-bf2e0d3fb4407ec38faa2016-08-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Retusin 10V, Negative-QTOFsplash10-0a4i-0009000000-8a5664df7dbdeed5c4972016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Retusin 20V, Negative-QTOFsplash10-0a4i-0029000000-3d02636a4b753879db622016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Retusin 40V, Negative-QTOFsplash10-02g5-1982000000-9cfa3016640c970c72612016-08-03Wishart LabView Spectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen Locations
  • Blood
Tissue LocationsNot Available
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodDetected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDFDB017112
KNApSAcK IDC00004653
Chemspider ID4508983
KEGG Compound IDNot Available
BioCyc IDCPD-14852
BiGG IDNot Available
Wikipedia LinkRetusin_(flavonol)
METLIN IDNot Available
PubChem CompoundNot Available
PDB IDNot Available
ChEBI ID144861
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDrw1504641
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Barupal DK, Fiehn O: Generating the Blood Exposome Database Using a Comprehensive Text Mining and Database Fusion Approach. Environ Health Perspect. 2019 Sep;127(9):97008. doi: 10.1289/EHP4713. Epub 2019 Sep 26. [PubMed:31557052 ]