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Record Information
Version5.0
StatusExpected but not Quantified
Creation Date2021-09-22 16:50:39 UTC
Update Date2021-09-22 16:50:39 UTC
HMDB IDHMDB0301747
Secondary Accession NumbersNone
Metabolite Identification
Common NameMellein
DescriptionMellein, also known as (R)-mellein, is a member of the class of compounds known as 2-benzopyrans. 2-benzopyrans 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 2-position. Mellein is slightly soluble (in water) and a very weakly acidic compound (based on its pKa). Mellein can be found in cocoa powder, which makes mellein a potential biomarker for the consumption of this food product. Mellein is a dihydroisocoumarin, a phenolic compound produced by Aspergillus ochraceus .
Structure
Thumb
Synonyms
ValueSource
(R)-MelleinChEMBL
Chemical FormulaC10H10O3
Average Molecular Weight178.1846
Monoisotopic Molecular Weight178.062994186
IUPAC Name(3R)-8-hydroxy-3-methyl-3,4-dihydro-1H-2-benzopyran-1-one
Traditional Name(3R)-8-hydroxy-3-methyl-3,4-dihydro-2-benzopyran-1-one
CAS Registry Number480-33-1
SMILES
C[C@@H]1CC2=CC=CC(O)=C2C(=O)O1
InChI Identifier
InChI=1S/C10H10O3/c1-6-5-7-3-2-4-8(11)9(7)10(12)13-6/h2-4,6,11H,5H2,1H3/t6-/m1/s1
InChI KeyKWILGNNWGSNMPA-ZCFIWIBFSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as 2-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 2-position.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassBenzopyrans
Sub Class2-benzopyrans
Direct Parent2-benzopyrans
Alternative Parents
Substituents
  • 2-benzopyran
  • 1-hydroxy-4-unsubstituted benzenoid
  • 1-hydroxy-2-unsubstituted benzenoid
  • Benzenoid
  • Vinylogous acid
  • Lactone
  • Carboxylic acid ester
  • Oxacycle
  • Monocarboxylic acid or derivatives
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External DescriptorsNot Available
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
logP2.27ALOGPS
logP2.58ChemAxon
logS-1.8ALOGPS
pKa (Strongest Acidic)9.65ChemAxon
pKa (Strongest Basic)-4.3ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area46.53 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity47.79 m³·mol⁻¹ChemAxon
Polarizability18.02 ųChemAxon
Number of Rings2ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
AllCCS[M+H]+138.15432859911
AllCCS[M+H-H2O]+133.65932859911
AllCCS[M+Na]+143.55332859911
AllCCS[M+NH4]+142.34432859911
AllCCS[M-H]-137.87432859911
AllCCS[M+Na-2H]-138.3132859911
AllCCS[M+HCOO]-138.86932859911
DeepCCS[M+H]+139.2330932474
DeepCCS[M-H]-136.83530932474
DeepCCS[M-2H]-171.6430932474
DeepCCS[M+Na]+146.20830932474

Predicted Kovats Retention Indices

Not Available
Spectra

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 10V, Positive-QTOFsplash10-004i-0900000000-0d3eaaf6d9c7c28816b02016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 20V, Positive-QTOFsplash10-004i-0900000000-5fec67cde147170efa202016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 40V, Positive-QTOFsplash10-0frf-9800000000-1861f1281639afb476092016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 10V, Negative-QTOFsplash10-0059-0900000000-289cf6e04ee44d556ba32016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 20V, Negative-QTOFsplash10-0059-0900000000-b17285eac1b74bc396222016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 40V, Negative-QTOFsplash10-053r-3900000000-6bc766c0387240ed13532016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 10V, Negative-QTOFsplash10-004i-0900000000-4cbce10969e4083a13d52021-10-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 20V, Negative-QTOFsplash10-0560-1900000000-876f70a876be7a62c36f2021-10-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 40V, Negative-QTOFsplash10-014l-9600000000-9bc95aff9060f37fa8d02021-10-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 10V, Positive-QTOFsplash10-004i-0900000000-23ba93dbfd31ecc3de2e2021-10-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 20V, Positive-QTOFsplash10-0059-0900000000-fe8c724305e6e760de4b2021-10-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Mellein 40V, Positive-QTOFsplash10-0a5l-4900000000-1cd98013de20749f04812021-10-21Wishart LabView Spectrum
Biological Properties
Cellular LocationsNot Available
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 IDFDB000337
KNApSAcK IDNot Available
Chemspider ID102686
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem CompoundNot Available
PDB IDNot Available
ChEBI IDNot Available
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