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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:45163 term browser browse the term
Definition:A sulfur oxide that has formula O7S2.
Synonyms:exact_synonym: mu-oxido-bis(trioxidosulfate)(2-)
 related_synonym: Formula=O7S2;   InChI=1S/H2O7S2/c1-8(2,3)7-9(4,5)6/h(H,1,2,3)(H,4,5,6)/p-2;   InChIKey=VFNGKCDDZUSWLR-UHFFFAOYSA-L;   PYROSULFATE;   SMILES=[O-]S(=O)(=O)OS([O-])(=O)=O;   [O3SOSO3](2-);   [S2O7](2-);   disulfate;   disulfate ion
 alt_id: CHEBI:29212;   CHEBI:45160
 xref: CAS:16057-15-1;   PDBeChem:PSL

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Path 1
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  CHEBI ontology 0
    chemical entity 0
      molecular entity 0
        inorganic molecular entity 0
          inorganic oxide 0
            sulfur oxide 0
              disulfate(2-) 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 0
    subatomic particle 0
      composite particle 0
        hadron 0
          baryon 0
            nucleon 0
              atomic nucleus 0
                atom 0
                  main group element atom 0
                    p-block element atom 0
                      chalcogen 0
                        oxygen atom 0
                          oxygen molecular entity 0
                            oxide 0
                              oxoanion 0
                                chalcogen oxoanion 0
                                  sulfur oxoanion 0
                                    disulfate(2-) 0
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