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Record Information
Version5.0
StatusExpected but not Quantified
Creation Date2012-09-11 17:53:54 UTC
Update Date2023-02-21 17:23:07 UTC
HMDB IDHMDB0033130
Secondary Accession Numbers
  • HMDB33130
Metabolite Identification
Common Name2-Acetyl-5-methylthiophene
Description2-Acetyl-5-methylthiophene belongs to the class of organic compounds known as aryl alkyl ketones. These are ketones have the generic structure RC(=O)R', where R = aryl group and R'=alkyl group. 2-Acetyl-5-methylthiophene has been detected, but not quantified in, a few different foods, such as arabica coffees (Coffea arabica), coffee and coffee products, and robusta coffees (Coffea canephora). This could make 2-acetyl-5-methylthiophene a potential biomarker for the consumption of these foods. Based on a literature review very few articles have been published on 2-Acetyl-5-methylthiophene.
Structure
Data?1677000187
Synonyms
ValueSource
-Methyl-5-acetylthiopheneHMDB
1-(5-Methyl-2-thienyl)-ethanoneHMDB
1-(5-Methyl-2-thienyl)ethan-1-oneHMDB
1-(5-Methyl-2-thienyl)ethanoneHMDB
1-(5-Methyl-2-thienyl)ethanone, 9ciHMDB
1-(5-Methylthiophen-2-yl)ethanoneHMDB
2-Methyl-5-acetylthiopheneHMDB
5-Methyl-2-acetylthiopheneHMDB
Ketone, methyl 5-methyl-2-thienylHMDB
Methyl 5-methyl-2-thienyl ketoneHMDB
MethylthienylcetoneHMDB
Thiophene, 2-acetyl-5-methylHMDB
Chemical FormulaC7H8OS
Average Molecular Weight140.203
Monoisotopic Molecular Weight140.029585568
IUPAC Name1-(5-methylthiophen-2-yl)ethan-1-one
Traditional Name1-(5-methylthiophen-2-yl)ethanone
CAS Registry Number13679-74-8
SMILES
CC(=O)C1=CC=C(C)S1
InChI Identifier
InChI=1S/C7H8OS/c1-5-3-4-7(9-5)6(2)8/h3-4H,1-2H3
InChI KeyYOSDTJYMDAEEAZ-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as aryl alkyl ketones. These are ketones have the generic structure RC(=O)R', where R = aryl group and R'=alkyl group.
KingdomOrganic compounds
Super ClassOrganic oxygen compounds
ClassOrganooxygen compounds
Sub ClassCarbonyl compounds
Direct ParentAryl alkyl ketones
Alternative Parents
Substituents
  • Aryl alkyl ketone
  • 2,5-disubstituted thiophene
  • Heteroaromatic compound
  • Thiophene
  • Organoheterocyclic compound
  • Organic oxide
  • Hydrocarbon derivative
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External DescriptorsNot Available
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
Role
Physical Properties
StateSolid
Experimental Molecular Properties
PropertyValueReference
Melting Point25 °CNot Available
Boiling Point232.00 to 234.00 °C. @ 760.00 mm HgThe Good Scents Company Information System
Water Solubility1510 mg/L @ 25 °C (est)The Good Scents Company Information System
LogP1.345 (est)The Good Scents Company Information System
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
PropertyValueSource
Water Solubility0.63 g/LALOGPS
logP1.67ALOGPS
logP2.09ChemAxon
logS-2.4ALOGPS
pKa (Strongest Acidic)15.16ChemAxon
pKa (Strongest Basic)-7.8ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area17.07 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity38.41 m³·mol⁻¹ChemAxon
Polarizability14.9 ųChemAxon
Number of Rings1ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DarkChem[M+H]+128.43431661259
DarkChem[M-H]-125.90531661259
DeepCCS[M+H]+134.56630932474
DeepCCS[M-H]-132.07730932474
DeepCCS[M-2H]-167.76430932474
DeepCCS[M+Na]+142.71430932474
AllCCS[M+H]+124.832859911
AllCCS[M+H-H2O]+120.132859911
AllCCS[M+NH4]+129.132859911
AllCCS[M+Na]+130.432859911
AllCCS[M-H]-127.532859911
AllCCS[M+Na-2H]-129.632859911
AllCCS[M+HCOO]-131.932859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
2-Acetyl-5-methylthiopheneCC(=O)C1=CC=C(C)S11802.1Standard polar33892256
2-Acetyl-5-methylthiopheneCC(=O)C1=CC=C(C)S11140.4Standard non polar33892256
2-Acetyl-5-methylthiopheneCC(=O)C1=CC=C(C)S11165.0Semi standard non polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Experimental GC-MSGC-MS Spectrum - 2-Acetyl-5-methylthiophene EI-B (Non-derivatized)splash10-004l-6900000000-4c66752fc8804d643e452017-09-12HMDB team, MONA, MassBankView Spectrum
Experimental GC-MSGC-MS Spectrum - 2-Acetyl-5-methylthiophene EI-B (Non-derivatized)splash10-004l-6900000000-4c66752fc8804d643e452018-05-18HMDB team, MONA, MassBankView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - 2-Acetyl-5-methylthiophene GC-MS (Non-derivatized) - 70eV, Positivesplash10-0f97-9500000000-221c37dd9da034c664ab2017-09-01Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - 2-Acetyl-5-methylthiophene 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 - 2-Acetyl-5-methylthiophene 10V, Positive-QTOFsplash10-006x-1900000000-640d0548b77c8bee049e2016-06-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 20V, Positive-QTOFsplash10-0006-2900000000-d5cda2cde3b42a3cf4962016-06-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 40V, Positive-QTOFsplash10-0f6t-9100000000-778edf9bc1e5639e6a202016-06-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 10V, Negative-QTOFsplash10-000i-1900000000-8d2883b88cb85db2468d2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 20V, Negative-QTOFsplash10-000j-7900000000-379dca35222ec29a2d2d2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 40V, Negative-QTOFsplash10-052r-9000000000-c11026cd152a1cdb971c2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 10V, Positive-QTOFsplash10-0006-9800000000-d308e316b19ec08aa0472021-09-23Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 20V, Positive-QTOFsplash10-0006-9000000000-a0a484d501488a121d7f2021-09-23Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 40V, Positive-QTOFsplash10-0596-9000000000-aad30a1553a79b62b2962021-09-23Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 10V, Negative-QTOFsplash10-0002-9300000000-9f4e18798c9347ccb7fb2021-09-25Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 20V, Negative-QTOFsplash10-0002-9000000000-ec78a34f16e305ec52be2021-09-25Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 2-Acetyl-5-methylthiophene 40V, Negative-QTOFsplash10-052b-9100000000-1592b3cfba6fbe6f4a9e2021-09-25Wishart LabView Spectrum

IR Spectra

Spectrum TypeDescriptionDeposition DateSourceView
Predicted IR SpectrumIR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+H]+)2023-02-04FELIX labView Spectrum
Predicted IR SpectrumIR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+Na]+)2023-02-04FELIX labView Spectrum
Biological Properties
Cellular Locations
  • Cytoplasm
  • Extracellular
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 IDFDB011131
KNApSAcK IDNot Available
Chemspider ID75479
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound83655
PDB IDNot Available
ChEBI IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDrw1503451
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.. .