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Record Information
Version4.0
StatusDetected but not Quantified
Creation Date2006-08-12 21:10:36 UTC
Update Date2020-11-09 23:17:21 UTC
HMDB IDHMDB0003447
Secondary Accession Numbers
  • HMDB03447
Metabolite Identification
Common NameTryptophol
DescriptionTryptophol, also known as indole-3-ethanol, is a catabolite of tryptophan converted by the gut microbiota. After absorption through the intestinal epithelium, tryptophan catabolites enter the bloodstream and are later excreted in the urine (PMID: 30120222 ). Tryptophol production was negatively associated with interferon-gamma production (IFNγ) which suggests that tryptophol has anti-inflammatory properties (PMID: 27814509 ). Tryptophol has also been identified as the hypnotic agent in trypanosomal sleeping sickness, and because it is formed in vivo after ethanol or disulfiram treatment, it is also associated with the study of alcoholism (PMID: 7241135 ).
Structure
Data?1582752277
Synonyms
ValueSource
1H-Indole-3-ethanolChEBI
1H-Indolyl-3-ethanolChEBI
2-(indol-3-yl)EthanolChEBI
3-(2-Hydroxyethyl)indoleChEBI
Indole-3-ethanolChEBI
TryptopholKegg
2-(1H-indol-3-yl)EthanolHMDB
2-(3-Indolyl)ethanolHMDB
2-(3-IndolylethanolHMDB
3-(b-Hydroxyethyl)indoleHMDB
3-(beta-Hydroxyethyl)indoleHMDB
3-IndoleethanolHMDB
3-IndolylethanolHMDB
b-(3-Indole)ethanolHMDB
beta-(3-Indole)ethanolHMDB
beta-indol-3-YlethanolHMDB
DL-TryptophanolHMDB
IEAHMDB
Indole ethanolHMDB
IndoleethanolHMDB
TryptophanolChEBI
3-(2-Hydroxyethyl)-1H-indoleHMDB
3-(β-Hydroxyethyl)indoleHMDB
3-Indole ethanolHMDB
β-(3-Indole)ethanolHMDB
Chemical FormulaC10H11NO
Average Molecular Weight161.2004
Monoisotopic Molecular Weight161.084063979
IUPAC Name2-(1H-indol-3-yl)ethan-1-ol
Traditional Nametryptophol
CAS Registry Number526-55-6
SMILES
OCCC1=CNC2=C1C=CC=C2
InChI Identifier
InChI=1S/C10H11NO/c12-6-5-8-7-11-10-4-2-1-3-9(8)10/h1-4,7,11-12H,5-6H2
InChI KeyMBBOMCVGYCRMEA-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as 3-alkylindoles. 3-alkylindoles are compounds containing an indole moiety that carries an alkyl chain at the 3-position.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassIndoles and derivatives
Sub ClassIndoles
Direct Parent3-alkylindoles
Alternative Parents
Substituents
  • 3-alkylindole
  • Benzenoid
  • Substituted pyrrole
  • Heteroaromatic compound
  • Pyrrole
  • Azacycle
  • Organic nitrogen compound
  • Organic oxygen compound
  • Organopnictogen compound
  • Hydrocarbon derivative
  • Primary alcohol
  • Organooxygen compound
  • Organonitrogen compound
  • Alcohol
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Ontology
Disposition

Route of exposure:

Biological location:

Source:

Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point59 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
Water Solubility1.61 g/LALOGPS
logP1.82ALOGPS
logP1.59ChemAxon
logS-2ALOGPS
pKa (Strongest Acidic)15.8ChemAxon
pKa (Strongest Basic)-2.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area36.02 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity48.72 m³·mol⁻¹ChemAxon
Polarizability17.88 ųChemAxon
Number of Rings2ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Spectra
Spectrum TypeDescriptionSplash KeyView
GC-MSGC-MS Spectrum - GC-MS (2 TMS)splash10-0udi-1591000000-5b173cc0ac0dc2b874a9Spectrum
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-0udi-1591000000-5b173cc0ac0dc2b874a9Spectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0udi-0490000000-15708d306e1f75b1e76fSpectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-001i-0900000000-d2769447ff27a79be367Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-00yi-5690000000-765b6a566d2067c199b0Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-03di-0900000000-593c6fbb6f64e16e7f05Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-03e9-0900000000-54f7b6548b8a00c91c3fSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-003u-0900000000-fb2793cd76eefaaf45c5Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-016r-0900000000-a97ae0f4c1633b83c415Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Negativesplash10-014i-0900000000-d00c24bc728f46156c60Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-03di-0900000000-593c6fbb6f64e16e7f05Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-03e9-0900000000-54f7b6548b8a00c91c3fSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-003u-0900000000-fb2793cd76eefaaf45c5Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-016r-0900000000-78c3b34c10c43b6a9317Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-014i-0900000000-d00c24bc728f46156c60Spectrum
LC-MS/MSLC-MS/MS Spectrum - , negativesplash10-03di-0900000000-d41cd8e81a55b3e00538Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-01ox-0900000000-5fb5f5b5efe809cbe9adSpectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-00kf-0900000000-44158c348db109504af4Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-014l-6900000000-48b709f034a27e74e73fSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-03di-0900000000-bfeeeabc14ffd14b537eSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-01q9-0900000000-e45fe37e44b99ede037eSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-014l-2900000000-84aa43c0f5ccfd6511bbSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-01ox-0900000000-ae84153e5d93042b79c8Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0006-0900000000-b04d1b793a892b605239Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-014l-1900000000-eceb6c67d77a5dddf240Spectrum
MSMass Spectrum (Electron Ionization)splash10-001i-2900000000-20fec68981d54c2e7002Spectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR13C NMR SpectrumNot AvailableSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR13C NMR SpectrumNot AvailableSpectrum
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableSpectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen Locations
  • Blood
  • Urine
Tissue LocationsNot Available
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothNormal details
UrineDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothNormal details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDFDB010973
KNApSAcK IDC00000114
Chemspider ID10235
KEGG Compound IDC00955
BioCyc IDCPD-341
BiGG IDNot Available
Wikipedia LinkTryptophol
METLIN ID6932
PubChem Compound10685
PDB IDNot Available
ChEBI ID17890
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB ID
References
Synthesis ReferenceSnyder, H. R.; Pilgrim, Frederick J. Preparation of 3-indoleacetic acid; new synthesis of tryptophol. Journal of the American Chemical Society (1948), 70 3770-1.
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Roager HM, Licht TR: Microbial tryptophan catabolites in health and disease. Nat Commun. 2018 Aug 17;9(1):3294. doi: 10.1038/s41467-018-05470-4. [PubMed:30120222 ]
  2. Schirmer M, Smeekens SP, Vlamakis H, Jaeger M, Oosting M, Franzosa EA, Ter Horst R, Jansen T, Jacobs L, Bonder MJ, Kurilshikov A, Fu J, Joosten LAB, Zhernakova A, Huttenhower C, Wijmenga C, Netea MG, Xavier RJ: Linking the Human Gut Microbiome to Inflammatory Cytokine Production Capacity. Cell. 2016 Nov 3;167(4):1125-1136.e8. doi: 10.1016/j.cell.2016.10.020. [PubMed:27814509 ]
  3. Cornford EM, Crane PD, Braun LD, Bocash WD, Nyerges AM, Oldendorf WH: Reduction in brain glucose utilization rate after tryptophol (3-indole ethanol) treatment. J Neurochem. 1981 May;36(5):1758-65. [PubMed:7241135 ]