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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2021-09-11 20:53:49 UTC
Update Date2021-09-26 23:16:16 UTC
HMDB IDHMDB0259001
Secondary Accession NumbersNone
Metabolite Identification
Common NameThiobarbital
Description5,5-diethyl-4,6-dihydroxy-2,5-dihydropyrimidine-2-thione belongs to the class of organic compounds known as thiobarbituric acid derivatives. These are organic compounds containing a 2-thioxodihydropyrimidine-4,6(1H,5H)-dione skeleton. Based on a literature review very few articles have been published on 5,5-diethyl-4,6-dihydroxy-2,5-dihydropyrimidine-2-thione. This compound has been identified in human blood as reported by (PMID: 31557052 ). Thiobarbital is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically Thiobarbital 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
SynonymsNot Available
Chemical FormulaC8H12N2O2S
Average Molecular Weight200.26
Monoisotopic Molecular Weight200.061948808
IUPAC Name5,5-diethyl-2-sulfanylidene-1,3-diazinane-4,6-dione
Traditional Namethiobarbital
CAS Registry NumberNot Available
SMILES
CCC1(CC)C(=O)NC(=S)NC1=O
InChI Identifier
InChI=1S/C8H12N2O2S/c1-3-8(4-2)5(11)9-7(13)10-6(8)12/h3-4H2,1-2H3,(H2,9,10,11,12,13)
InChI KeyQGVNJRROSLYGKF-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as thiobarbituric acid derivatives. These are organic compounds containing a 2-thioxodihydropyrimidine-4,6(1H,5H)-dione skeleton.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassDiazines
Sub ClassPyrimidines and pyrimidine derivatives
Direct ParentThiobarbituric acid derivatives
Alternative Parents
Substituents
  • Thiobarbiturate
  • 1,3-diazinane
  • Thiourea
  • Azacycle
  • Carboxylic acid derivative
  • Organic nitrogen compound
  • Organic oxygen compound
  • Organopnictogen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organosulfur compound
  • Organooxygen compound
  • Organonitrogen compound
  • Carbonyl group
  • Aliphatic heteromonocyclic compound
Molecular FrameworkAliphatic heteromonocyclic 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
logP1.71ALOGPS
logP1.61ChemAxon
logS-2.4ALOGPS
pKa (Strongest Acidic)7.2ChemAxon
pKa (Strongest Basic)-8.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area58.2 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity52.24 m³·mol⁻¹ChemAxon
Polarizability19.89 ųChemAxon
Number of Rings1ChemAxon
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]+139.90430932474
DeepCCS[M-H]-136.07330932474
DeepCCS[M-2H]-173.65830932474
DeepCCS[M+Na]+149.19730932474
AllCCS[M+H]+143.132859911
AllCCS[M+H-H2O]+139.032859911
AllCCS[M+NH4]+146.932859911
AllCCS[M+Na]+148.032859911
AllCCS[M-H]-142.832859911
AllCCS[M+Na-2H]-143.932859911
AllCCS[M+HCOO]-145.232859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
ThiobarbitalCCC1(CC)C(=O)NC(=S)NC1=O3233.7Standard polar33892256
ThiobarbitalCCC1(CC)C(=O)NC(=S)NC1=O1669.3Standard non polar33892256
ThiobarbitalCCC1(CC)C(=O)NC(=S)NC1=O1847.9Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
Thiobarbital,1TMS,isomer #1CCC1(CC)C(=O)NC(=S)N([Si](C)(C)C)C1=O1675.4Semi standard non polar33892256
Thiobarbital,1TMS,isomer #1CCC1(CC)C(=O)NC(=S)N([Si](C)(C)C)C1=O1831.1Standard non polar33892256
Thiobarbital,1TMS,isomer #1CCC1(CC)C(=O)NC(=S)N([Si](C)(C)C)C1=O2817.3Standard polar33892256
Thiobarbital,2TMS,isomer #1CCC1(CC)C(=O)N([Si](C)(C)C)C(=S)N([Si](C)(C)C)C1=O1671.7Semi standard non polar33892256
Thiobarbital,2TMS,isomer #1CCC1(CC)C(=O)N([Si](C)(C)C)C(=S)N([Si](C)(C)C)C1=O1858.1Standard non polar33892256
Thiobarbital,2TMS,isomer #1CCC1(CC)C(=O)N([Si](C)(C)C)C(=S)N([Si](C)(C)C)C1=O2349.3Standard polar33892256
Thiobarbital,1TBDMS,isomer #1CCC1(CC)C(=O)NC(=S)N([Si](C)(C)C(C)(C)C)C1=O1883.0Semi standard non polar33892256
Thiobarbital,1TBDMS,isomer #1CCC1(CC)C(=O)NC(=S)N([Si](C)(C)C(C)(C)C)C1=O2071.3Standard non polar33892256
Thiobarbital,1TBDMS,isomer #1CCC1(CC)C(=O)NC(=S)N([Si](C)(C)C(C)(C)C)C1=O2886.0Standard polar33892256
Thiobarbital,2TBDMS,isomer #1CCC1(CC)C(=O)N([Si](C)(C)C(C)(C)C)C(=S)N([Si](C)(C)C(C)(C)C)C1=O2104.2Semi standard non polar33892256
Thiobarbital,2TBDMS,isomer #1CCC1(CC)C(=O)N([Si](C)(C)C(C)(C)C)C(=S)N([Si](C)(C)C(C)(C)C)C1=O2310.8Standard non polar33892256
Thiobarbital,2TBDMS,isomer #1CCC1(CC)C(=O)N([Si](C)(C)C(C)(C)C)C(=S)N([Si](C)(C)C(C)(C)C)C1=O2461.6Standard polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - Thiobarbital GC-MS (Non-derivatized) - 70eV, Positivesplash10-004i-9610000000-7c9c4976dd8a1756860e2021-09-23Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Thiobarbital GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart 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 IDNot Available
KNApSAcK IDNot Available
Chemspider ID580885
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 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 ]