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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.

Term:citric acid-d4
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Accession:CHEBI:76049 term browser browse the term
Definition:A deuterated compound that is citric acid in which the four methylene hydrogens are replaced by deuterium.
Synonyms:exact_synonym: 2-hydroxy((2)H4)propane-1,2,3-tricarboxylic acid
 related_synonym: Formula=C6H4D4O7;   InChI=1S/C6H8O7/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)/i1D2,2D2;   InChIKey=KRKNYBCHXYNGOX-LNLMKGTHSA-N;   SMILES=[2H]C([2H])(C(O)=O)C(O)(C(O)=O)C([2H])([2H])C(O)=O

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Path 1
Term Annotations click to browse term
  CHEBI ontology 20089
    chemical entity 20088
      molecular entity 20058
        isotopically modified compound 1
          deuterated compound 0
            citric acid-d4 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 20089
    subatomic particle 20058
      composite particle 20058
        hadron 20088
          baryon 20088
            nucleon 20088
              atomic nucleus 20088
                atom 20058
                  main group element atom 19960
                    p-block element atom 19990
                      carbon group element atom 19916
                        carbon atom 19909
                          organic molecular entity 19909
                            organic group 18988
                              organic divalent group 18950
                                organodiyl group 18974
                                  carbonyl group 18903
                                    carbonyl compound 18925
                                      carboxylic acid 18597
                                        tricarboxylic acid 2460
                                          citric acid-d4 0
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