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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:36120 term browser browse the term
Definition:The simplest member of the class of pyryliums that is pyran with a protonated oxygen.
Synonyms:exact_synonym: pyranium
 related_synonym: Formula=C5H5O;   InChI=1S/C5H5O/c1-2-4-6-5-3-1/h1-5H/q+1;   InChIKey=WVIICGIFSIBFOG-UHFFFAOYSA-N;   SMILES=c1cc[o+]cc1;   pyrylium cation;   pyrylium ion
 xref: Beilstein:1421881;   Gmelin:558560;   Reaxys:1421881;   Wikipedia:Pyrylium

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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 19875
    chemical entity 19875
      molecular entity 19872
        mancude ring 8137
          organic mancude parent 8137
            pyryliums 0
              pyrylium 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19875
    subatomic particle 19873
      composite particle 19873
        hadron 19873
          baryon 19873
            nucleon 19873
              atomic nucleus 19873
                atom 19873
                  main group element atom 19763
                    p-block element atom 19763
                      carbon group element atom 19668
                        carbon atom 19657
                          organic molecular entity 19657
                            organic molecule 19586
                              organic cyclic compound 19395
                                organic heterocyclic compound 18511
                                  organic heteromonocyclic compound 16621
                                    pyrans 1134
                                      pyran 424
                                        2H-pyran 0
                                          pyryliums 0
                                            pyrylium 0
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