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Record Information
Version1.0
Creation Date2016-07-13 19:40:56 UTC
Update Date2016-07-20 21:03:05 UTC
LmdbLMDB00035
Secondary Accession NumbersNone
Metabolite Identification
Common NameDihydrothymine
DescriptionDihydrothymine is an intermediate breakdown product of thymine. Dihydropyrimidine dehydrogenase catalyzes the reduction of thymine to 5, 6-dihydrothymine then dihydropyrimidinase hydrolyzes 5, 6-dihydrothymine to N-carbamyl-b-alanine. Finally, beta-ureidopropionase catalyzes the conversion of N-carbamyl-b-alanine to beta-alanine. Patients with dihydropyrimidinase deficiency exhibit highly increased concentrations of 5, 6-dihydrouracil and 5, 6-dihydrothymine and moderately increased concentrations of uracil and thymine can be detected in urine.
Structure
Thumb
Synonyms
ValueSource
5,6-dihydro-5-MethyluracilChEBI
5-Methyl-5,6-dihydrouracilChEBI
5,6-DihydrothymineHMDB
5-Methyl-hydrouracilHMDB
5-Methyldihydropyrimidine-2,4(1H,3H)-dioneHMDB
dihydro-5-Methyl-2,4(1H,3H)-pyrimidinedioneHMDB
5-MethyldihydrouracilMeSH
5,6-Dihydrothymine, (S)-isomerMeSH
Chemical FormulaC5H8N2O2
Average Molecular Weight128.1292
Monoisotopic Molecular Weight128.05857751
IUPAC Name5-methyl-1,3-diazinane-2,4-dione
Traditional Namedihydrothymine
CAS Registry Number696-04-8
SMILES
CC1CNC(=O)NC1=O
InChI Identifier
InChI=1S/C5H8N2O2/c1-3-2-6-5(9)7-4(3)8/h3H,2H2,1H3,(H2,6,7,8,9)
InChI KeyNBAKTGXDIBVZOO-UHFFFAOYSA-N
Chemical Taxonomy
DescriptionThis compound belongs to the class of chemical entities known as ureides. These are compounds containing an ureide group with the general structure R1-CO-NH-CO-N(R)2R3, formally derived by the acylation of urea. They can be subdivided in N-acyl or N,N'-diacyl ureas.
KingdomChemical entities
Super ClassOrganic compounds
ClassOrganic acids and derivatives
Sub ClassOrganic carbonic acids and derivatives
Direct ParentUreides
Alternative Parents
Substituents
  • Ureide
  • 5,6-dihydropyrimidine
  • Hydropyrimidine
  • Azacycle
  • Organoheterocyclic compound
  • Organic 1,3-dipolar compound
  • Propargyl-type 1,3-dipolar organic compound
  • Organic nitrogen compound
  • Organic oxygen compound
  • Organopnictogen compound
  • Hydrocarbon derivative
  • Organooxygen compound
  • Organonitrogen compound
  • Aliphatic heteromonocyclic compound
Molecular FrameworkAliphatic heteromonocyclic compounds
External Descriptors
Ontology
StatusDetected but not Quantified
OriginNot Available
BiofunctionNot Available
ApplicationNot Available
Cellular locationsNot Available
Physical Properties
StateNot Available
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP-0.8ALOGPS
logP-0.67ChemAxon
logS-0.84ALOGPS
pKa (Strongest Acidic)11.7ChemAxon
pKa (Strongest Basic)-7.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area58.2 Å2ChemAxon
Rotatable Bond Count0ChemAxon
Refractivity30.32 m3·mol-1ChemAxon
Polarizability12.03 Å3ChemAxon
Number of Rings1ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash Key
GC-MSGC-MS Spectrum - GC-MS (1 TMS)splash10-000i-5900000000-0b84b9786838d29e07abView in MoNA
GC-MSGC-MS Spectrum - GC-MS (2 TMS)splash10-0zmi-8980000000-d75d30c6e5fdb4643aa5View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-004i-8900000000-db662635cbae4d48204bView in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-0006-9000000000-c3960ffe99d74c617000View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-0006-9000000000-9a6c2715f931ff084157View in MoNA
MSMass Spectrum (Electron Ionization)splash10-004l-9200000000-873ae62dcdf602237ec1View in MoNA
1D NMR1H NMR SpectrumNot Available
1D NMR1H NMR SpectrumNot Available
1D NMR13C NMR SpectrumNot Available
2D NMR[1H,13C] 2D NMR SpectrumNot Available
Biological Properties
Cellular LocationsNot Available
Biofluid Locations and Tissue Locations
  • Milk
  • Urine
Concentrations
BiofluidStatusValueConditionSpeciesReferenceDetails
MilkDetected but not QuantifiedNot ApplicableNot AvailableBovine details
UrineDetected but not QuantifiedNot ApplicableNot AvailableEquine
    • E. E. Escalona, J...
details
DrugBank IDNot Available
HMDB IDHMDB00079
FooDB IDFDB021892
Phenol Explorer IDNot Available
KNApSAcK IDNot Available
BiGG ID36347
BioCyc IDDIHYDRO-THYMINE
METLIN ID5135
PDB IDNot Available
Wikipedia LinkDihydrothymine
Chemspider ID84456
ChEBI ID27468
PubChem Compound ID93556
Kegg Compound IDC00906
YMDB IDNot Available
ECMDB IDECMDB00079
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available