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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:oxygen-15 atom
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Accession:CHEBI:36932 term browser browse the term
Definition:The radioactive isotope of oxygen with relative atomic mass 15.003065. The longest-lived oxygen radionuclide with half-life of 122.2 s.
Synonyms:related_synonym: (15)8O;   (15)O;   Formula=[15O];   InChI=1S/O/i1-1;   InChIKey=QVGXLLKOCUKJST-BJUDXGSMSA-N;   SMILES=[15O];   oxygen, isotope of mass 15;   oxygen-15
 xref: CAS:13982-43-9;   Gmelin:316575

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Path 1
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  CHEBI ontology 19751
    chemical entity 19749
      atom 19749
        nonmetal atom 19689
          oxygen atom 19469
            oxygen-15 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19751
    subatomic particle 19749
      composite particle 19749
        hadron 19749
          baryon 19749
            nucleon 19749
              atomic nucleus 19749
                atom 19749
                  main group element atom 19698
                    p-block element atom 19698
                      chalcogen 19492
                        oxygen atom 19469
                          oxygen-15 atom 0
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