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CHEBI ONTOLOGY - ANNOTATIONS

The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/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-18 atom
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Accession:CHEBI:33815 term browser browse the term
Definition:The stable isotope of oxygen with relative atomic mass 17.999160 and 0.205 atom percent natural abundance.
Synonyms:related_synonym: (18)8O;   (18)O;   Formula=[18O];   InChI=1S/O/i1+2;   InChIKey=QVGXLLKOCUKJST-NJFSPNSNSA-N;   SMILES=[18O];   heavy oxygen;   oxygen, isotope of mass 18;   oxygen-18;   schwerer Sauerstoff
 xref: CAS:14797-71-8;   Gmelin:17562



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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 26039
    chemical entity 26018
      atom 26014
        nonmetal atom 25504
          oxygen atom 24813
            oxygen-18 atom 0
              ((18)O)water 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 26039
    subatomic particle 26014
      composite particle 26014
        hadron 26014
          baryon 26014
            nucleon 26014
              atomic nucleus 26014
                atom 26014
                  main group element atom 25840
                    p-block element atom 25840
                      chalcogen 24925
                        oxygen atom 24813
                          oxygen-18 atom 0
                            ((18)O)water 0
paths to the root