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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:15960 term browser browse the term
Definition:A quaternary ammonium ion that has formula C9H18NO4.
Synonyms:exact_synonym: (2R)-2-(acetyloxy)-3-carboxy-N,N,N-trimethylpropan-1-aminium
 related_synonym: Formula=C9H18NO4;   InChI=1S/C9H17NO4/c1-7(11)14-8(5-9(12)13)6-10(2,3)4/h8H,5-6H2,1-4H3/p+1/t8-/m1/s1;   InChIKey=RDHQFKQIGNGIED-MRVPVSSYSA-O;   O-Acetyl-L-carnitine;   O-Acetylcarnitine;   SMILES=CC(=O)O[C@H](CC(O)=O)C[N+](C)(C)C
 alt_id: CHEBI:12711;   CHEBI:21936;   CHEBI:7669
 xref: KEGG:C02571
 cyclic_relationship: is_conjugate_acid_of CHEBI:73024

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Path 1
Term Annotations click to browse term
  CHEBI ontology 24513
    chemical entity 24481
      molecular entity 24444
        ion 17255
          organic ion 8778
            organic cation 7509
              quaternary ammonium ion 5181
                O-acetylcarnitinium 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 24513
    subatomic particle 24471
      composite particle 24471
        hadron 24471
          baryon 24471
            nucleon 24471
              atomic nucleus 24471
                atom 24471
                  main group element atom 24327
                    p-block element atom 24327
                      carbon group element atom 24112
                        carbon atom 24074
                          organic molecular entity 24074
                            organic group 22410
                              organic divalent group 22387
                                organodiyl group 22387
                                  carbonyl group 22372
                                    carbonyl compound 22372
                                      carboxylic acid 21369
                                        monocarboxylic acid 20328
                                          fatty acid 18322
                                            short-chain fatty acid 17895
                                              fatty acid 4:0 7923
                                                butyric acid 6279
                                                  gamma-amino-beta-hydroxybutyric acid 0
                                                    carnitinium 0
                                                      (R)-carnitinium 0
                                                        O-acetylcarnitinium 0
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