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Version5.0
StatusExpected but not Quantified
Creation Date2005-11-16 15:48:42 UTC
Update Date2022-03-07 02:49:08 UTC
HMDB IDHMDB0000981
Secondary Accession Numbers
  • HMDB00981
Metabolite Identification
Common Name4a-Methyl-5a-cholesta-8,24-dien-3-one
Description4a-Methyl-5a-cholesta-8,24-dien-3-one, also known as 3-keto-4alpha-methyl-zymosterol, belongs to the class of organic compounds known as cholesterols and derivatives. Cholesterols and derivatives are compounds containing a 3-hydroxylated cholestane core. Thus, 4a-methyl-5a-cholesta-8,24-dien-3-one is considered to be a sterol lipid molecule. 4a-Methyl-5a-cholesta-8,24-dien-3-one is a very hydrophobic molecule, practically insoluble (in water), and relatively neutral.
Structure
Data?1582752169
Synonyms
ValueSource
(4alpha,5alpha)-4-Methylcholesta-8,24-dien-3-oneChEBI
3-Keto-4alpha-methyl-zymosterolChEBI
3-Keto-4alpha-methylzymosterolChEBI
4alpha-Methyl-(5alpha)-cholesta-8,24-dien-3-oneChEBI
(4a,5a)-4-Methylcholesta-8,24-dien-3-oneGenerator
(4Α,5α)-4-methylcholesta-8,24-dien-3-oneGenerator
3-Keto-4a-methyl-zymosterolGenerator
3-Keto-4α-methyl-zymosterolGenerator
3-Keto-4a-methylzymosterolGenerator
3-Keto-4α-methylzymosterolGenerator
4a-Methyl-(5a)-cholesta-8,24-dien-3-oneGenerator
4Α-methyl-(5α)-cholesta-8,24-dien-3-oneGenerator
4alpha-Methyl-5alpha-cholesta-8,24-dien-3-oneHMDB
Chemical FormulaC28H44O
Average Molecular Weight396.6484
Monoisotopic Molecular Weight396.33921603
IUPAC Name(2S,6S,7S,11R,14R,15R)-2,6,15-trimethyl-14-[(2R)-6-methylhept-5-en-2-yl]tetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-1(10)-en-5-one
Traditional Name(2S,6S,7S,11R,14R,15R)-2,6,15-trimethyl-14-[(2R)-6-methylhept-5-en-2-yl]tetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-1(10)-en-5-one
CAS Registry Number7377-73-3
SMILES
[H][C@@]1(CC[C@@]2([H])C3=C(CC[C@]12C)[C@@]1(C)CCC(=O)[C@@H](C)[C@]1([H])CC3)[C@H](C)CCC=C(C)C
InChI Identifier
InChI=1S/C28H44O/c1-18(2)8-7-9-19(3)22-12-13-24-21-10-11-23-20(4)26(29)15-17-28(23,6)25(21)14-16-27(22,24)5/h8,19-20,22-24H,7,9-17H2,1-6H3/t19-,20+,22-,23+,24+,27-,28+/m1/s1
InChI KeyDBPZYKHQDWKORQ-SINUOACOSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as cholesterols and derivatives. Cholesterols and derivatives are compounds containing a 3-hydroxylated cholestane core.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassSteroids and steroid derivatives
Sub ClassCholestane steroids
Direct ParentCholesterols and derivatives
Alternative Parents
Substituents
  • Cholesterol-skeleton
  • 3-oxo-5-alpha-steroid
  • Oxosteroid
  • 3-oxosteroid
  • Cyclic ketone
  • Ketone
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic homopolycyclic compound
Molecular FrameworkAliphatic homopolycyclic compounds
External Descriptors
Ontology
Physiological effect
Disposition
Process
Role
Physical Properties
StateSolid
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 Solubility0.00056 g/LALOGPS
logP7.22ALOGPS
logP7.41ChemAxon
logS-5.8ALOGPS
pKa (Strongest Acidic)19.83ChemAxon
pKa (Strongest Basic)-7.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area17.07 ŲChemAxon
Rotatable Bond Count4ChemAxon
Refractivity124.75 m³·mol⁻¹ChemAxon
Polarizability50.94 ųChemAxon
Number of Rings4ChemAxon
BioavailabilityYesChemAxon
Rule of FiveNoChemAxon
Ghose FilterNoChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DarkChem[M+H]+199.74431661259
DarkChem[M-H]-194.16931661259
AllCCS[M+H]+205.99332859911
AllCCS[M-H]-208.91132859911
DeepCCS[M-2H]-241.98230932474
DeepCCS[M+Na]+216.43730932474
AllCCS[M+H]+206.032859911
AllCCS[M+H-H2O]+203.832859911
AllCCS[M+NH4]+208.032859911
AllCCS[M+Na]+208.532859911
AllCCS[M-H]-208.932859911
AllCCS[M+Na-2H]-210.432859911
AllCCS[M+HCOO]-212.332859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
4a-Methyl-5a-cholesta-8,24-dien-3-one[H][C@@]1(CC[C@@]2([H])C3=C(CC[C@]12C)[C@@]1(C)CCC(=O)[C@@H](C)[C@]1([H])CC3)[C@H](C)CCC=C(C)C3024.1Standard polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one[H][C@@]1(CC[C@@]2([H])C3=C(CC[C@]12C)[C@@]1(C)CCC(=O)[C@@H](C)[C@]1([H])CC3)[C@H](C)CCC=C(C)C3146.8Standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one[H][C@@]1(CC[C@@]2([H])C3=C(CC[C@]12C)[C@@]1(C)CCC(=O)[C@@H](C)[C@]1([H])CC3)[C@H](C)CCC=C(C)C3236.8Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TMS,isomer #1CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CCC(O[Si](C)(C)C)=C(C)[C@@H]1CC33260.6Semi standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TMS,isomer #1CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CCC(O[Si](C)(C)C)=C(C)[C@@H]1CC33182.6Standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TMS,isomer #1CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CCC(O[Si](C)(C)C)=C(C)[C@@H]1CC33475.0Standard polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TMS,isomer #2CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CC=C(O[Si](C)(C)C)[C@@H](C)[C@@H]1CC33195.8Semi standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TMS,isomer #2CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CC=C(O[Si](C)(C)C)[C@@H](C)[C@@H]1CC33106.0Standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TMS,isomer #2CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CC=C(O[Si](C)(C)C)[C@@H](C)[C@@H]1CC33473.1Standard polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TBDMS,isomer #1CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CCC(O[Si](C)(C)C(C)(C)C)=C(C)[C@@H]1CC33490.2Semi standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TBDMS,isomer #1CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CCC(O[Si](C)(C)C(C)(C)C)=C(C)[C@@H]1CC33410.5Standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TBDMS,isomer #1CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CCC(O[Si](C)(C)C(C)(C)C)=C(C)[C@@H]1CC33600.5Standard polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TBDMS,isomer #2CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CC=C(O[Si](C)(C)C(C)(C)C)[C@@H](C)[C@@H]1CC33445.7Semi standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TBDMS,isomer #2CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CC=C(O[Si](C)(C)C(C)(C)C)[C@@H](C)[C@@H]1CC33256.7Standard non polar33892256
4a-Methyl-5a-cholesta-8,24-dien-3-one,1TBDMS,isomer #2CC(C)=CCC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@@]21C)[C@@]1(C)CC=C(O[Si](C)(C)C(C)(C)C)[C@@H](C)[C@@H]1CC33595.9Standard polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one GC-MS (Non-derivatized) - 70eV, Positivesplash10-02au-1019000000-74f38f1f24d48a20f4b02017-09-01Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 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 - 4a-Methyl-5a-cholesta-8,24-dien-3-one 10V, Positive-QTOFsplash10-0002-0009000000-1225e33fc8dbc85e29fd2017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 20V, Positive-QTOFsplash10-0174-2009000000-71b5c36c965fb209ee162017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 40V, Positive-QTOFsplash10-0ap0-2119000000-e1899d14bd1d0142d0f12017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 10V, Negative-QTOFsplash10-0002-0009000000-133fa32ff7ba267c45fd2017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 20V, Negative-QTOFsplash10-0002-0009000000-61f0749dd8a63d07401e2017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 40V, Negative-QTOFsplash10-02di-3009000000-3b2e5d918411006b6e762017-09-01Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 10V, Positive-QTOFsplash10-002b-0009000000-dabf3142c40a4512bbdc2021-09-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 20V, Positive-QTOFsplash10-05p9-5589000000-dc34720a786d693f5d5e2021-09-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 40V, Positive-QTOFsplash10-0a4i-8942000000-801d53df4f599d0ae81b2021-09-21Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 10V, Negative-QTOFsplash10-0002-0009000000-2f6aa9af0bd8878fb6c62021-09-25Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 20V, Negative-QTOFsplash10-0002-0009000000-2f6aa9af0bd8878fb6c62021-09-25Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 4a-Methyl-5a-cholesta-8,24-dien-3-one 40V, Negative-QTOFsplash10-0006-0009000000-ec12d6f6902d6552044d2021-09-25Wishart LabView Spectrum

NMR Spectra

Spectrum TypeDescriptionDeposition DateSourceView
Predicted 1D NMR13C NMR Spectrum (1D, 100 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 100 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 1000 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 1000 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 200 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 200 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 300 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 300 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 400 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 400 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 500 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 500 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 600 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 700 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 700 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 800 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 800 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 900 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 900 MHz, H2O, predicted)2022-08-20Wishart LabView Spectrum
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane (predicted from logP)
Biospecimen LocationsNot Available
Tissue LocationsNot Available
Pathways
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 IDFDB022350
KNApSAcK IDNot Available
Chemspider ID20059529
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN ID5918
PubChem Compound22298939
PDB IDNot Available
ChEBI ID136486
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDNot Available
References
Synthesis ReferenceBarton, Derek H. R.; Harrison, David Miles; Moss, G. P.; Widdowson, David A. Biosynthesis of steroids and terpenoids. II. Role of 24-methylene derivatives in the biosynthesis of steroids and terpenoids. Journal of the Chemical Society [Section] C: Organic (1970), (6), 775-85.
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available

Enzymes

General function:
Involved in oxidoreductase activity
Specific function:
Responsible for the reduction of the keto group on the C-3 of sterols.
Gene Name:
HSD17B7
Uniprot ID:
P56937
Molecular weight:
38205.77