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Record Information
Version2.0
Created at2022-09-08 20:23:47 UTC
Updated at2022-09-08 20:23:48 UTC
NP-MRD IDNP0273378
Secondary Accession NumbersNone
Natural Product Identification
Common Name18-methyl-icosanoic acid
Description18-Methylicosanoic acid, also known as 18-methylarachidic acid or anteisoheneicosanoic acid, belongs to the class of organic compounds known as long-chain fatty acids. These are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. 18-methyl-icosanoic acid is found in Myrmekioderma rea and Suberites massa. 18-methyl-icosanoic acid was first documented in 1989 (PMID: 2721159). 18-Methylicosanoic acid is a very hydrophobic molecule, practically insoluble (in water), and relatively neutral (PMID: 17718471) (PMID: 9519472).
Structure
Thumb
Synonyms
ValueSource
18-Methylarachidic acidChEBI
18-Methyleicosanoic acidChEBI
Anteisoheneicosanoic acidChEBI
18-MethylarachidateGenerator
18-MethyleicosanoateGenerator
AnteisoheneicosanoateGenerator
18-MethylicosanoateGenerator
18-MEAMeSH
MethylarachidateGenerator
Chemical FormulaC21H42O2
Average Mass326.5650 Da
Monoisotopic Mass326.31848 Da
IUPAC Name18-methylicosanoic acid
Traditional Name(+)-18-methyl-icosanoic acid
CAS Registry NumberNot Available
SMILES
CCC(C)CCCCCCCCCCCCCCCCC(O)=O
InChI Identifier
InChI=1S/C21H42O2/c1-3-20(2)18-16-14-12-10-8-6-4-5-7-9-11-13-15-17-19-21(22)23/h20H,3-19H2,1-2H3,(H,22,23)
InChI KeyWSRCOZWDQPJAQT-UHFFFAOYSA-N
Experimental Spectra
Not Available
Predicted Spectra
Chemical Shift Submissions
Not Available
Species
Species of Origin
Species NameSourceReference
Myrmekioderma reaLOTUS Database
Suberites massaLOTUS Database
Chemical Taxonomy
Description Belongs to the class of organic compounds known as long-chain fatty acids. These are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassFatty Acyls
Sub ClassFatty acids and conjugates
Direct ParentLong-chain fatty acids
Alternative Parents
Substituents
  • Long-chain fatty acid
  • Methyl-branched fatty acid
  • Branched fatty acid
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physical Properties
StateNot Available
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP8.89ALOGPS
logP8.32ChemAxon
logS-7ALOGPS
pKa (Strongest Acidic)4.95ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area37.3 ŲChemAxon
Rotatable Bond Count18ChemAxon
Refractivity100.04 m³·mol⁻¹ChemAxon
Polarizability44.65 ųChemAxon
Number of Rings0ChemAxon
BioavailabilityNoChemAxon
Rule of FiveNoChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
HMDB IDNot Available
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDNot Available
KNApSAcK IDNot Available
Chemspider IDNot Available
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound5282602
PDB IDNot Available
ChEBI ID84877
Good Scents IDNot Available
References
General References
  1. McMullen RL, Kelty SP: Molecular dynamic simulations of eicosanoic acid and 18-methyleicosanoic acid langmuir monolayers. J Phys Chem B. 2007 Sep 20;111(37):10849-52. doi: 10.1021/jp073697k. Epub 2007 Aug 24. [PubMed:17718471 ]
  2. Wertz PW, Downing DT: Integral lipids of mammalian hair. Comp Biochem Physiol B. 1989;92(4):759-61. doi: 10.1016/0305-0491(89)90264-2. [PubMed:2721159 ]
  3. Jones LN, Rivett DE: The role of 18-methyleicosanoic acid in the structure and formation of mammalian hair fibres. Micron. 1997 Dec;28(6):469-85. doi: 10.1016/s0968-4328(97)00039-5. [PubMed:9519472 ]
  4. LOTUS database [Link]