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Record Information
StatusExpected but not Quantified
Creation Date2006-08-14 00:33:07 UTC
Update Date2020-02-26 21:25:12 UTC
Secondary Accession Numbers
  • HMDB04690
Metabolite Identification
Common NameHepoxilin B3
DescriptionHepoxilin B3 is a normal human epidermis eicosanoid. Hepoxilin B3 is dramatically elevated in psoriatic lesions. The primary biological action of the hepoxilins appears to relate to their ability to release calcium from intracellular stores through a receptor-mediated action. The receptor is intracellular, and appears to be G-protein coupled. The conversion of hepoxilin into its omega-hydroxy catabolite has recently been demonstrated through the action of an omega-hydroxylase. This enzyme is different from that which oxidizes leukotriene B4, as the former activity is lost when the cell is disrupted, while leukotriene B4-catabolic activity is recovered in both the intact and disrupted cell. Additionally, hepoxilin catabolism is inhibited by CCCP, a mitochondrial uncoupler, while leukotriene catabolism is unaffected. As hepoxilins cause the translocation of calcium from intracellular stores in the endoplasmic reticulum to the mitochondria, it is speculated that hepoxilin omega-oxidation takes place in the mitochondria, and the omega-oxidation product facilitates accumulation of the elevated cytosolic calcium by the mitochondria. (PMID 10692117 , 11851887 , 10086189 ).
(5Z,8Z,14Z)-(11S,12S)-11,12-Epoxy-10-hydroxyeicosa-5,8,14-trienoic acidKegg
(5Z,8Z,14Z)-(11S,12S)-11,12-Epoxy-10-hydroxyicosa-5,8,14-trienoic acidKegg
10-Hydroxy-11,12-epoxyeicosa-5,8,14-trienoic acidHMDB
Hepoxilin bHMDB
Threo-hepoxilin b3HMDB
Erythro-hepoxilin b3HMDB
(5Z,8Z)-10-Hydroxy-10-{(2R,3S)-3-[(2Z)-oct-2-en-1-yl]oxiran-2-yl}deca-5,8-dienoic acidHMDB
(5Z,8Z,14Z)-(11R,12S)-11,12-Epoxy-10-hydroxyeicosa-5,8,14-trienoic acidHMDB
(5Z,8Z,14Z)-(11R,12S)-11,12-Epoxy-10-hydroxyicosa-5,8,14-trienoic acidHMDB
10-Hydroxy-11R,12S-epoxy-5Z,8Z,14Z-eicosatrienoic acidHMDB
Chemical FormulaC20H32O4
Average Molecular Weight336.4657
Monoisotopic Molecular Weight336.230059512
IUPAC Name(5Z,8Z)-10-hydroxy-10-[(2R,3S)-3-[(2Z)-oct-2-en-1-yl]oxiran-2-yl]deca-5,8-dienoic acid
Traditional Nameepheta
CAS Registry NumberNot Available
InChI Identifier
Chemical Taxonomy
Description belongs to the class of organic compounds known as hepoxilins. These are eicosanoids containing an oxirane group attached to the fatty acyl chain.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassFatty Acyls
Sub ClassEicosanoids
Direct ParentHepoxilins
Alternative Parents
  • Hepoxilin
  • Medium-chain hydroxy acid
  • Medium-chain fatty acid
  • Epoxy fatty acid
  • Heterocyclic fatty acid
  • Hydroxy fatty acid
  • Fatty acid
  • Unsaturated fatty acid
  • Secondary alcohol
  • Carboxylic acid derivative
  • Carboxylic acid
  • Dialkyl ether
  • Oxirane
  • Ether
  • Oxacycle
  • Organoheterocyclic compound
  • Monocarboxylic acid or derivatives
  • Organic oxide
  • Hydrocarbon derivative
  • Carbonyl group
  • Alcohol
  • Organic oxygen compound
  • Organooxygen compound
  • Aliphatic heteromonocyclic compound
Molecular FrameworkAliphatic heteromonocyclic compounds
External Descriptors

Route of exposure:


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 Solubility0.0092 g/LALOGPS
pKa (Strongest Acidic)4.82ChemAxon
pKa (Strongest Basic)-3.3ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area70.06 ŲChemAxon
Rotatable Bond Count14ChemAxon
Refractivity99.57 m³·mol⁻¹ChemAxon
Polarizability39.72 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0f89-1900000000-7e176d0aeaf4c4f1ee84Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (2 TMS) - 70eV, Positivesplash10-004i-7509200000-646f9e780523dd7060e7Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-014i-0419000000-8de60f1d7da49d39d629Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0100-2901000000-2b574e8af2bff160c04aSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-052f-9300000000-171ed87708ea6a95def5Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-000i-0319000000-57e762a656ee448ceae4Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0udi-0902000000-c21e19e865d525b26795Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-9500000000-683be61d26516deb4500Spectrum
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane
  • Mitochondria
Biospecimen LocationsNot Available
Tissue Locations
  • Epidermis
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 IDFDB023407
KNApSAcK IDNot Available
Chemspider ID4446330
KEGG Compound IDC14810
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkHepoxilin
PubChem Compound5283209
PDB IDNot Available
ChEBI ID34784
Food Biomarker OntologyNot Available
VMH IDNot Available
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Anton R, Vila L: Stereoselective biosynthesis of hepoxilin B3 in human epidermis. J Invest Dermatol. 2000 Mar;114(3):554-9. [PubMed:10692117 ]
  2. Anton R, Camacho M, Puig L, Vila L: Hepoxilin B3 and its enzymatically formed derivative trioxilin B3 are incorporated into phospholipids in psoriatic lesions. J Invest Dermatol. 2002 Jan;118(1):139-46. [PubMed:11851887 ]
  3. Pace-Asciak CR, Reynaud D, Demin P, Nigam S: The hepoxilins. A review. Adv Exp Med Biol. 1999;447:123-32. [PubMed:10086189 ]