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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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Path 1
Term Annotations click to browse term
  CHEBI ontology 21771
    chemical entity 21769
      molecular entity 21756
        polyatomic entity 21649
          molecule 21297
            cyclic compound 20893
              aromatic compound 20271
                organic aromatic compound 20271
                  arene 17889
                    monocyclic arene 5721
                      cyclopentadienide 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 21771
    subatomic particle 21757
      composite particle 21757
        hadron 21757
          baryon 21757
            nucleon 21757
              atomic nucleus 21757
                atom 21757
                  main group element atom 21674
                    main group molecular entity 21674
                      s-block molecular entity 21217
                        hydrogen molecular entity 21157
                          hydrides 20378
                            organic hydride 19909
                              organic fundamental parent 19909
                                hydrocarbon 19756
                                  olefin 5677
                                    cyclic olefin 103
                                      monocyclic olefin 100
                                        cycloalkadiene 10
                                          cyclopentadiene 0
                                            cyclopentadienide 0
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