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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:74165 term browser browse the term
Definition:An alkadiene consisting of pentane with the two double bonds located at positions 1 and 3.
Synonyms:exact_synonym: (3E)-penta-1,3-diene
 related_synonym: (E)-CH2=CHCH=CHCH3;   Formula=C5H8;   InChI=1S/C5H8/c1-3-5-4-2/h3-5H,1H2,2H3/b5-4+;   InChIKey=PMJHHCWVYXUKFD-SNAWJCMRSA-N;   SMILES=C\\C=C\\C=C;   piperylene;   trans-1,3-pentadiene;   trans-1-Methylbutadiene;   trans-Penta-1,3-diene;   trans-piperylene
 xref: CAS:2004-70-8;   PMID:11535090;   PMID:18039817;   PMID:20121122;   Reaxys:1523659

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Path 1
Term Annotations click to browse term
  CHEBI ontology 19810
    chemical entity 19810
      atom 19808
        nonmetal atom 19683
          carbon atom 19588
            organic molecular entity 19588
              olefinic compound 14480
                olefin 7191
                  acyclic olefin 7171
                    alkadiene 2077
                      (E)-1,3-pentadiene 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19810
    subatomic particle 19808
      composite particle 19808
        hadron 19808
          baryon 19808
            nucleon 19808
              atomic nucleus 19808
                atom 19808
                  main group element atom 19696
                    main group molecular entity 19696
                      s-block molecular entity 19456
                        hydrogen molecular entity 19447
                          hydrides 18703
                            organic hydride 18265
                              organic fundamental parent 18265
                                hydrocarbon 17986
                                  olefin 7191
                                    acyclic olefin 7171
                                      alkadiene 2077
                                        (E)-1,3-pentadiene 0
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