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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC BY 3.0, For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.

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Accession:CHEBI:145653 term browser browse the term
Definition:A methyl ester resulting from the formal condensation of the carboxy group of 4-(trimethylammonio)butanoic acid with methanol.
Synonyms:exact_synonym: 4-methoxy-N,N,N-trimethyl-4-oxobutan-1-aminium
 related_synonym: Formula=C8H18NO2;   InChI=1S/C8H18NO2/c1-9(2,3)7-5-6-8(10)11-4/h5-7H2,1-4H3/q+1;   InChIKey=XQSLKIBWQSTAGK-UHFFFAOYSA-N;   SMILES=C([N+](C)(C)C)CCC(=O)OC;   carpronium cation;   carpronium ion
 xref: CAS:14075-13-9;   Drug_Central:519;   PMID:6745806

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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 24775
    role 24693
      application 23841
        fuel 11288
          methanol 3184
            methyl ester 3149
              carpronium 0
                carpronium chloride 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 24775
    subatomic particle 24735
      composite particle 24735
        hadron 24735
          baryon 24735
            nucleon 24735
              atomic nucleus 24735
                atom 24735
                  main group element atom 24601
                    main group molecular entity 24601
                      s-block molecular entity 23907
                        hydrogen molecular entity 23745
                          hydrides 21962
                            inorganic hydride 19168
                              pnictogen hydride 19141
                                nitrogen hydride 18819
                                  ammonium 8050
                                    ammonium ion derivative 8046
                                      quaternary ammonium ion 5196
                                        4-(trimethylammonio)butanoic acid 0
                                          carpronium 0
                                            carpronium chloride 0
paths to the root