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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 19767
    chemical entity 19767
      molecular entity 19766
        ion 15945
          organic ion 8455
            organic cation 7307
              quaternary ammonium ion 5096
                O-acetylcarnitinium 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19767
    subatomic particle 19766
      composite particle 19766
        hadron 19766
          baryon 19766
            nucleon 19766
              atomic nucleus 19766
                atom 19766
                  main group element atom 19657
                    p-block element atom 19657
                      carbon group element atom 19573
                        carbon atom 19563
                          organic molecular entity 19563
                            organic group 18599
                              organic divalent group 18590
                                organodiyl group 18590
                                  carbonyl group 18505
                                    carbonyl compound 18505
                                      carboxylic acid 18156
                                        monocarboxylic acid 17530
                                          fatty acid 16012
                                            short-chain fatty acid 15699
                                              fatty acid 4:0 7856
                                                butyric acid 6206
                                                  gamma-amino-beta-hydroxybutyric acid 0
                                                    carnitinium 0
                                                      (R)-carnitinium 0
                                                        O-acetylcarnitinium 0
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