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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:55540 term browser browse the term
Definition:The anion of (R)-2-hydroxynonanoic acid.
Synonyms:exact_synonym: (2R)-2-hydroxynonanoate
 related_synonym: Formula=C9H17O3;   InChI=1S/C9H18O3/c1-2-3-4-5-6-7-8(10)9(11)12/h8,10H,2-7H2,1H3,(H,11,12)/p-1/t8-/m1/s1;   InChIKey=BTJFTHOOADNOOS-MRVPVSSYSA-M;   SMILES=CCCCCCC[C@@H](O)C([O-])=O
 cyclic_relationship: is_conjugate_base_of CHEBI:55538

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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 19816
    role 19764
      biological role 19764
        biochemical role 19313
          metabolite 19294
            eukaryotic metabolite 18943
              plant metabolite 17424
                nonanoate 0
                  (R)-2-hydroxynonanoate 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19816
    subatomic particle 19814
      composite particle 19814
        hadron 19814
          baryon 19814
            nucleon 19814
              atomic nucleus 19814
                atom 19814
                  main group element atom 19702
                    p-block element atom 19702
                      carbon group element atom 19608
                        carbon atom 19597
                          organic molecular entity 19597
                            organic ion 8327
                              organic anion 3018
                                carboxylic acid anion 2388
                                  monocarboxylic acid anion 1489
                                    fatty acid anion 100
                                      saturated fatty acid anion 99
                                        straight-chain saturated fatty acid anion 8
                                          nonanoate 0
                                            (R)-2-hydroxynonanoate 0
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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.