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Record Information
Version5.0
StatusExpected but not Quantified
Creation Date2013-06-18 18:41:57 UTC
Update Date2019-07-23 07:14:49 UTC
HMDB IDHMDB0060666
Secondary Accession Numbers
  • HMDB60666
Metabolite Identification
Common NameEndoxifen
DescriptionEndoxifen (EDX) is a key active metabolite of tamoxifen (TAM) with higher affinity and specificity to estrogen receptors that also inhibits aromatase activity. (PMID: 23274567 ) Tamoxifen is an antagonist of the estrogen receptor in breast tissue via its active metabolite, hydroxytamoxifen. In other tissues such as the endometrium, it behaves as an agonist, and thus may be characterized as a mixed agonist/antagonist. Tamoxifen is the usual endocrine therapy for hormone receptor-positive breast cancer in pre-menopausal women, and is also a standard in post-menopausal women although aromatase inhibitors are also frequently used in that setting. (Wikipedia ) The pharmacological activity of Tamoxifen is dependent on its conversion to its active metabolite, endoxifen, by CYP2D6. (PMID: 23711794 ) Tamoxifen is a largely inactive pro-drug, requiring metabolism into its most important metabolite endoxifen. Since the cytochrome P450 (CYP) 2D6 enzyme is primarily involved in this metabolism, genetic polymorphisms of this enzyme, but also drug-induced CYP2D6 inhibition can result in considerably reduced endoxifen formation and as a consequence may affect the efficacy of tamoxifen treatment. (PMID: 23760858 )
Structure
Data?1563866089
Synonyms
ValueSource
4-Hydroxy-N-desmethyltamoxifenKegg
4-Hydroxy-N-demethyltamoxifenHMDB
4-Hydroxy-N-desmethyltamoxifen, (Z)-isomerHMDB
Z-EndoxifenMeSH
Chemical FormulaC25H27NO2
Average Molecular Weight373.4874
Monoisotopic Molecular Weight373.204179113
IUPAC Name4-[(1Z)-1-{4-[2-(methylamino)ethoxy]phenyl}-2-phenylbut-1-en-1-yl]phenol
Traditional Nameendoxifen
CAS Registry NumberNot Available
SMILES
CC\C(=C(/C1=CC=C(O)C=C1)C1=CC=C(OCCNC)C=C1)C1=CC=CC=C1
InChI Identifier
InChI=1S/C25H27NO2/c1-3-24(19-7-5-4-6-8-19)25(20-9-13-22(27)14-10-20)21-11-15-23(16-12-21)28-18-17-26-2/h4-16,26-27H,3,17-18H2,1-2H3/b25-24-
InChI KeyMHJBZVSGOZTKRH-IZHYLOQSSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as stilbenes. These are organic compounds containing a 1,2-diphenylethylene moiety. Stilbenes (C6-C2-C6 ) are derived from the common phenylpropene (C6-C3) skeleton building block. The introduction of one or more hydroxyl groups to a phenyl ring lead to stilbenoids.
KingdomOrganic compounds
Super ClassPhenylpropanoids and polyketides
ClassStilbenes
Sub ClassNot Available
Direct ParentStilbenes
Alternative Parents
Substituents
  • Stilbene
  • Diphenylmethane
  • Phenylpropane
  • Phenoxy compound
  • Phenol ether
  • Alkyl aryl ether
  • 1-hydroxy-2-unsubstituted benzenoid
  • Phenol
  • Monocyclic benzene moiety
  • Benzenoid
  • Secondary amine
  • Ether
  • Secondary aliphatic amine
  • Organic oxygen compound
  • Amine
  • Organooxygen compound
  • Organonitrogen compound
  • Organic nitrogen compound
  • Organopnictogen compound
  • Hydrocarbon derivative
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External Descriptors
Ontology
Physiological effectNot Available
Disposition
Process
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
Water Solubility0.00092 g/LALOGPS
logP5.32ALOGPS
logP4.92ChemAxon
logS-5.6ALOGPS
pKa (Strongest Acidic)9.12ChemAxon
pKa (Strongest Basic)9.74ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area41.49 ŲChemAxon
Rotatable Bond Count8ChemAxon
Refractivity125.12 m³·mol⁻¹ChemAxon
Polarizability43.54 ųChemAxon
Number of Rings3ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleYesChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DarkChem[M+H]+192.82431661259
DarkChem[M-H]-191.20931661259
DeepCCS[M+H]+194.9230932474
DeepCCS[M-H]-192.56230932474
DeepCCS[M-2H]-226.70530932474
DeepCCS[M+Na]+201.93330932474
AllCCS[M+H]+194.932859911
AllCCS[M+H-H2O]+192.032859911
AllCCS[M+NH4]+197.732859911
AllCCS[M+Na]+198.432859911
AllCCS[M-H]-196.932859911
AllCCS[M+Na-2H]-196.832859911
AllCCS[M+HCOO]-196.832859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
EndoxifenCC\C(=C(/C1=CC=C(O)C=C1)C1=CC=C(OCCNC)C=C1)C1=CC=CC=C14035.4Standard polar33892256
EndoxifenCC\C(=C(/C1=CC=C(O)C=C1)C1=CC=C(OCCNC)C=C1)C1=CC=CC=C12890.9Standard non polar33892256
EndoxifenCC\C(=C(/C1=CC=C(O)C=C1)C1=CC=C(OCCNC)C=C1)C1=CC=CC=C13064.7Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
Endoxifen,1TMS,isomer #1CC/C(=C(/C1=CC=C(OCCNC)C=C1)C1=CC=C(O[Si](C)(C)C)C=C1)C1=CC=CC=C13311.9Semi standard non polar33892256
Endoxifen,1TMS,isomer #2CC/C(=C(\C1=CC=C(O)C=C1)C1=CC=C(OCCN(C)[Si](C)(C)C)C=C1)C1=CC=CC=C13531.5Semi standard non polar33892256
Endoxifen,2TMS,isomer #1CC/C(=C(/C1=CC=C(OCCN(C)[Si](C)(C)C)C=C1)C1=CC=C(O[Si](C)(C)C)C=C1)C1=CC=CC=C13472.9Semi standard non polar33892256
Endoxifen,2TMS,isomer #1CC/C(=C(/C1=CC=C(OCCN(C)[Si](C)(C)C)C=C1)C1=CC=C(O[Si](C)(C)C)C=C1)C1=CC=CC=C13160.9Standard non polar33892256
Endoxifen,2TMS,isomer #1CC/C(=C(/C1=CC=C(OCCN(C)[Si](C)(C)C)C=C1)C1=CC=C(O[Si](C)(C)C)C=C1)C1=CC=CC=C13707.9Standard polar33892256
Endoxifen,1TBDMS,isomer #1CC/C(=C(/C1=CC=C(OCCNC)C=C1)C1=CC=C(O[Si](C)(C)C(C)(C)C)C=C1)C1=CC=CC=C13541.4Semi standard non polar33892256
Endoxifen,1TBDMS,isomer #2CC/C(=C(\C1=CC=C(O)C=C1)C1=CC=C(OCCN(C)[Si](C)(C)C(C)(C)C)C=C1)C1=CC=CC=C13744.9Semi standard non polar33892256
Endoxifen,2TBDMS,isomer #1CC/C(=C(/C1=CC=C(OCCN(C)[Si](C)(C)C(C)(C)C)C=C1)C1=CC=C(O[Si](C)(C)C(C)(C)C)C=C1)C1=CC=CC=C13896.8Semi standard non polar33892256
Endoxifen,2TBDMS,isomer #1CC/C(=C(/C1=CC=C(OCCN(C)[Si](C)(C)C(C)(C)C)C=C1)C1=CC=C(O[Si](C)(C)C(C)(C)C)C=C1)C1=CC=CC=C13568.0Standard non polar33892256
Endoxifen,2TBDMS,isomer #1CC/C(=C(/C1=CC=C(OCCN(C)[Si](C)(C)C(C)(C)C)C=C1)C1=CC=C(O[Si](C)(C)C(C)(C)C)C=C1)C1=CC=CC=C13850.1Standard polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - Endoxifen GC-MS (Non-derivatized) - 70eV, Positivesplash10-0006-9133000000-c2161354cdf77d434e992017-09-20Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Endoxifen GC-MS (1 TMS) - 70eV, Positivesplash10-0006-9004200000-3d59e8fe230516e4b37b2017-10-06Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Endoxifen GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Endoxifen GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 10V, Positive-QTOFsplash10-00di-2249000000-8346297433ff370f4efc2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 20V, Positive-QTOFsplash10-0a4i-9353000000-c4a46698f9bb9d64a6a32016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 40V, Positive-QTOFsplash10-0a4l-9251000000-f988f5670acac5e08df62016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 10V, Negative-QTOFsplash10-00di-1009000000-62ed97feda2a9f20b6ac2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 20V, Negative-QTOFsplash10-01b9-1019000000-b6b443507b9eb725195a2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 40V, Negative-QTOFsplash10-014i-6297000000-442332a961e6bb4bfde82016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 10V, Positive-QTOFsplash10-00di-0019000000-d78eeafe19daa54ddac92021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 20V, Positive-QTOFsplash10-05fr-1149000000-e1df0c6d8dfb9b3287132021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 40V, Positive-QTOFsplash10-066u-9823000000-06951b7a731996b904ce2021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 10V, Negative-QTOFsplash10-00di-0009000000-b38f885c98c9697e45e82021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 20V, Negative-QTOFsplash10-00xr-0019000000-bbed0c38c9db23b2f1cd2021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Endoxifen 40V, Negative-QTOFsplash10-02ta-0089000000-32d3e92619afbb528e2a2021-10-12Wishart LabView Spectrum
Biological Properties
Cellular Locations
  • Cytoplasm
  • Membrane (predicted from logP)
Biospecimen Locations
  • Blood
  • Urine
Tissue Locations
  • Kidney
  • Liver
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodExpected but not QuantifiedNot QuantifiedNot AvailableNot AvailableNormal
      Not Available
details
UrineExpected but not QuantifiedNot QuantifiedNot AvailableNot AvailableNormal
      Not Available
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 IDNot Available
KEGG Compound IDC16547
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkEndoxifen
METLIN IDNot Available
PubChem Compound10090750
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. Ribeiro MP, Silva FS, Santos AE, Santos MS, Custodio JB: The antiestrogen endoxifen protects rat liver mitochondria from permeability transition pore opening and oxidative stress at concentrations that do not affect the phosphorylation efficiency. Toxicol Appl Pharmacol. 2013 Feb 15;267(1):104-12. doi: 10.1016/j.taap.2012.12.012. Epub 2012 Dec 27. [PubMed:23274567 ]
  2. Yang G, Nowsheen S, Aziz K, Georgakilas AG: Toxicity and adverse effects of Tamoxifen and other anti-estrogen drugs. Pharmacol Ther. 2013 Sep;139(3):392-404. doi: 10.1016/j.pharmthera.2013.05.005. Epub 2013 May 24. [PubMed:23711794 ]
  3. Binkhorst L, Mathijssen RH, van Herk-Sukel MP, Bannink M, Jager A, Wiemer EA, van Gelder T: Unjustified prescribing of CYP2D6 inhibiting SSRIs in women treated with tamoxifen. Breast Cancer Res Treat. 2013 Jun;139(3):923-9. doi: 10.1007/s10549-013-2585-z. Epub 2013 Jun 13. [PubMed:23760858 ]