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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:deuterium atom
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Accession:CHEBI:29237 term browser browse the term
Definition:The stable isotope of hydrogen with relative atomic mass 2.014102 and a natural abundance of 0.0115 atom percent (from Greek deltaepsilonupsilontauepsilonrhoomicronnu, second).
Synonyms:related_synonym: (2)1H;   (2)H;   D;   Deuterium;   Formula=D;   InChI=1S/H2/h1H/i1+1;   InChIKey=UFHFLCQGNIYNRP-OUBTZVSYSA-N;   SMILES=[2H];   deuterio;   heavy hydrogen;   hidrogeno pesado;   hydrogen-2;   schwerer Wasserstoff

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Path 1
Term Annotations click to browse term
  CHEBI ontology 397
    chemical entity 397
      molecular entity 397
        inorganic molecular entity 337
          hydrogen atom 334
            deuterium atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 397
    subatomic particle 397
      composite particle 397
        hadron 397
          baryon 397
            nucleon 397
              atomic nucleus 397
                atom 397
                  main group element atom 390
                    main group molecular entity 390
                      s-block molecular entity 335
                        hydrogen molecular entity 334
                          elemental hydrogen 0
                            monoatomic hydrogen 0
                              hydron 0
                                deuteron 0
                                  deuterium atom 0
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