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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:36767 term browser browse the term
Definition:A monocyclic arene that has formula C5H5.
Synonyms:exact_synonym: cyclopenta-2,4-dienide
 related_synonym: C5H5;   Cp(-);   Formula=C5H5;   InChI=1S/C5H5/c1-2-4-5-3-1/h1-5H/q-1;   InChIKey=SINKOGOPEQSHQD-UHFFFAOYSA-N;   SMILES=c1cc[cH-]c1;   cyclopentadienide anion
 xref: Beilstein:3587332;   CAS:12127-83-2;   Gmelin:81759

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  CHEBI ontology 0
    chemical entity 0
      molecular entity 0
        polyatomic entity 0
          molecule 0
            cyclic compound 0
              aromatic compound 0
                organic aromatic compound 0
                  arene 0
                    monocyclic arene 0
                      cyclopentadienide 0
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  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
                    main group molecular entity 0
                      s-block molecular entity 0
                        hydrogen molecular entity 0
                          hydrides 0
                            organic hydride 0
                              organic fundamental parent 0
                                hydrocarbon 0
                                  olefin 0
                                    cyclic olefin 0
                                      monocyclic olefin 0
                                        cycloalkadiene 0
                                          cyclopentadiene 0
                                            cyclopentadienide 0
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