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Record Information
StatusDetected and Quantified
Creation Date2006-05-22 14:17:35 UTC
Update Date2018-05-20 09:58:27 UTC
Secondary Accession Numbers
  • HMDB02088
Metabolite Identification
Common NameN-Oleoylethanolamine
DescriptionN-Oleoylethanolamine (NOE or OEA) is a N-acylethanolamine. N-acylethanolamines (NAEs) constitute a class of lipid compounds naturally present in both animal and plant membranes as constituents of the membrane-bound phospholipid, N-acylphosphatidylethanolamine (NAPE). NAPE is composed of a third fatty acid moiety linked to the amino head group of the commonly occurring membrane phospholipid, phosphatidylethanolamine. NAEs are released from NAPE by phospholipase D-type hydrolases in response to a variety of stimuli. Transient NAE release and accumulation has been attributed a variety of biological activities, including neurotransmission, membrane protection, and immunomodulation in animals. N-oleoylethanolamine is an inhibitor of the sphingolipid signaling pathway, via specific ceramidase inhibition (ceramidase converts ceramide to sphingosine). N-oleoylethanolamine blocks the effects of TNF- and arachidonic acid on intracellular Ca concentration. (PMID: 12692337 , 12056855 , 12560208 , 11997249 ). N-oleoyl ethanolamine is related to the endocannabinoid anandamide. Endocannabinoids signal through cannabinoid receptors (also stimulated by the active ingredient of cannabis) but although related in structure, synthesis and degradation to anandamide, NOE cannot be considered an endocannabinoid as it does not activate the cannabinoid receptors. Most of the reported responses to NOE can be attributed to activation of peroxisome proliferator-activated receptor-alpha (PPAR-alpha). Administration of NOE inhibits body weight gain in rats. In adipocytes and hepatocytes, NOE inhibits mitogenic and metabolic signaling by the insulin receptor and produces glucose intolerance. It also inhibits gastric emptying, which might act together with the sensory neuronal signals to achieve satiety. NOE is permanently elevated in diabetic obese patients. NOE also reduces visceral and inflammatory responses through a PPAR-alpha-activation independent mechanism (PMID: 17449181 ). NOE has been shown to be an antagonist of TRVP1 (the transient receptor potential vanilloid type 1 receptor). Overall, NOE has beneficial effects on health by inducing food intake control, lipid beta-oxidation, body weight loss and analgesic effects (PMID: 18704536 ).
N-(9Z-Octadecenoyl) ethanolamineChEBI
N-(cis-9-Octadecenoyl) ethanolamineChEBI
N-Oleoyl ethanolamineChEBI
Oleamide meaChEBI
Oleoyl 1-ethanolamideChEBI
Oleoyl monoethanolamideChEBI
N-Oleoyl ethanolamine, oleoyl monoethanolamide, oleoylethanolamideHMDB
Oleic acid ethanolamideHMDB
Oleic acid monoethanolamideHMDB
Chemical FormulaC20H39NO2
Average Molecular Weight325.5292
Monoisotopic Molecular Weight325.298079497
IUPAC Name(9Z)-N-(2-hydroxyethyl)octadec-9-enamide
Traditional Nameoleoylethanolamide
CAS Registry Number111-58-0
InChI Identifier
Chemical Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as n-acylethanolamines. These are compounds containing an N-acyethanolamine moiety, which is characterized by an acyl group is linked to the nitrogen atom of ethanolamine.
KingdomOrganic compounds
Super ClassOrganic nitrogen compounds
ClassOrganonitrogen compounds
Sub ClassAmines
Direct ParentN-acylethanolamines
Alternative Parents
  • N-acylethanolamine
  • Fatty amide
  • N-acyl-amine
  • Fatty acyl
  • Carboxamide group
  • Secondary carboxylic acid amide
  • Carboxylic acid derivative
  • Alcohol
  • Organooxygen compound
  • Primary alcohol
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organic oxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors


Biological location:


Naturally occurring process:


Industrial application:

Biological role:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility0.00024 g/LALOGPS
pKa (Strongest Acidic)15.47ChemAxon
pKa (Strongest Basic)-0.33ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area49.33 ŲChemAxon
Rotatable Bond Count17ChemAxon
Refractivity100.41 m³·mol⁻¹ChemAxon
Polarizability42.77 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash Key
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0fdn-9880000000-505c4b2acd75d00c6b4cView in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-00di-9442000000-7630c4851b9379891389View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-qTof , Positivesplash10-0592-2950000000-3a4675ee36a05c78c6daView in MoNA
LC-MS/MSLC-MS/MS Spectrum - , positivesplash10-0a4i-6924100000-697643f4a75f68f27795View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-01t9-5149000000-4df23e68e6a0912a6bbcView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-03dl-9221000000-c242848558751b665958View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-01ox-9410000000-af2a86c6d06cfb4d91d9View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-00di-0029000000-6deda61377943259bcf3View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-074l-8079000000-82821facf1a599eef918View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-9010000000-332b31d63933e6f4814cView in MoNA
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane
Biospecimen Locations
  • Blood
  • Feces
Tissue LocationsNot Available
Normal Concentrations
BloodDetected and Quantified0.0036 +/- 0.00068 uMAdult (>18 years old)Both
BloodDetected and Quantified46.8 +/- 34 uMAdult (>18 years old)Both
FecesDetected but not Quantified Adult (>18 years old)Both
Abnormal Concentrations
FecesDetected but not Quantified Adult (>18 years old)Both
Colorectal cancer
FecesDetected but not Quantified Adult (>18 years old)BothColorectal Cancer details
FecesDetected but not Quantified Adult (>18 years old)Both
Colorectal cancer
Associated Disorders and Diseases
Disease References
Colorectal cancer
  1. Brown DG, Rao S, Weir TL, O'Malia J, Bazan M, Brown RJ, Ryan EP: Metabolomics and metabolic pathway networks from human colorectal cancers, adjacent mucosa, and stool. Cancer Metab. 2016 Jun 6;4:11. doi: 10.1186/s40170-016-0151-y. eCollection 2016. [PubMed:27275383 ]
  2. Sinha R, Ahn J, Sampson JN, Shi J, Yu G, Xiong X, Hayes RB, Goedert JJ: Fecal Microbiota, Fecal Metabolome, and Colorectal Cancer Interrelations. PLoS One. 2016 Mar 25;11(3):e0152126. doi: 10.1371/journal.pone.0152126. eCollection 2016. [PubMed:27015276 ]
  3. Goedert JJ, Sampson JN, Moore SC, Xiao Q, Xiong X, Hayes RB, Ahn J, Shi J, Sinha R: Fecal metabolomics: assay performance and association with colorectal cancer. Carcinogenesis. 2014 Sep;35(9):2089-96. doi: 10.1093/carcin/bgu131. Epub 2014 Jul 18. [PubMed:25037050 ]
Associated OMIM IDs
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDFDB022839
KNApSAcK IDNot Available
Chemspider ID4446574
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkOleoylethanolamide
METLIN IDNot Available
PubChem Compound5283454
PDB IDNot Available
ChEBI ID71466
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Hofmann U, Domeier E, Frantz S, Laser M, Weckler B, Kuhlencordt P, Heuer S, Keweloh B, Ertl G, Bonz AW: Increased myocardial oxygen consumption by TNF-alpha is mediated by a sphingosine signaling pathway. Am J Physiol Heart Circ Physiol. 2003 Jun;284(6):H2100-5. Epub 2003 Jan 30. [PubMed:12560208 ]
  2. Tripathy S, Kleppinger-Sparace K, Dixon RA, Chapman KD: N-acylethanolamine signaling in tobacco is mediated by a membrane-associated, high-affinity binding protein. Plant Physiol. 2003 Apr;131(4):1781-91. [PubMed:12692337 ]
  3. Lecour S, Smith RM, Woodward B, Opie LH, Rochette L, Sack MN: Identification of a novel role for sphingolipid signaling in TNF alpha and ischemic preconditioning mediated cardioprotection. J Mol Cell Cardiol. 2002 May;34(5):509-18. [PubMed:12056855 ]
  4. Amadou A, Nawrocki A, Best-Belpomme M, Pavoine C, Pecker F: Arachidonic acid mediates dual effect of TNF-alpha on Ca2+ transients and contraction of adult rat cardiomyocytes. Am J Physiol Cell Physiol. 2002 Jun;282(6):C1339-47. [PubMed:11997249 ]
  5. Suardiaz M, Estivill-Torrus G, Goicoechea C, Bilbao A, Rodriguez de Fonseca F: Analgesic properties of oleoylethanolamide (OEA) in visceral and inflammatory pain. Pain. 2007 Dec 15;133(1-3):99-110. Epub 2007 Apr 20. [PubMed:17449181 ]
  6. Thabuis C, Tissot-Favre D, Bezelgues JB, Martin JC, Cruz-Hernandez C, Dionisi F, Destaillats F: Biological functions and metabolism of oleoylethanolamide. Lipids. 2008 Oct;43(10):887-94. doi: 10.1007/s11745-008-3217-y. Epub 2008 Aug 13. [PubMed:18704536 ]


General function:
Involved in ceramidase activity
Specific function:
Hydrolyzes the sphingolipid ceramide into sphingosine and free fatty acid at an optimal pH of 6.5-8.5. Acts as a key regulator of sphingolipid signaling metabolites by generating sphingosine at the cell surface. Acts as a repressor of apoptosis both by reducing C16-ceramide, thereby preventing ceramide-induced apoptosis, and generating sphingosine, a precursor of the antiapoptotic factor sphingosine 1-phosphate. Probably involved in the digestion of dietary sphingolipids in intestine by acting as a key enzyme for the catabolism of dietary sphingolipids and regulating the levels of bioactive sphingolipid metabolites in the intestinal tract.
Gene Name:
Uniprot ID:
Molecular weight:
  1. Hofmann U, Domeier E, Frantz S, Laser M, Weckler B, Kuhlencordt P, Heuer S, Keweloh B, Ertl G, Bonz AW: Increased myocardial oxygen consumption by TNF-alpha is mediated by a sphingosine signaling pathway. Am J Physiol Heart Circ Physiol. 2003 Jun;284(6):H2100-5. Epub 2003 Jan 30. [PubMed:12560208 ]