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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:72565 term browser browse the term
Definition:Any organic heterobicyclic compound containing ortho-fused imidazole and tetrazine rings.
Synonyms:related_synonym: imidazotetrazines

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Your selection has 3054 annotated objects. The maximum number of objects that can be shown is 2000. The list is too large to display.

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    Path 1
    Term Annotations click to browse term
      CHEBI ontology 20089
        chemical entity 20088
          atom 20058
            nonmetal atom 19979
              nitrogen atom 18963
                nitrogen molecular entity 18937
                  organonitrogen compound 18736
                    organonitrogen heterocyclic compound 17766
                      imidazotetrazine 3054
                        temozolomide 3053
    Path 2
    Term Annotations click to browse term
      CHEBI ontology 20089
        subatomic particle 20058
          composite particle 20058
            hadron 20088
              baryon 20088
                nucleon 20088
                  atomic nucleus 20088
                    atom 20058
                      main group element atom 19960
                        p-block element atom 19990
                          p-block molecular entity 19990
                            carbon group molecular entity 19885
                              organic molecular entity 19909
                                organic molecule 19856
                                  organic cyclic compound 19612
                                    organic heterocyclic compound 18824
                                      organic heteropolycyclic compound 18298
                                        organic heterobicyclic compound 17170
                                          imidazotetrazine 3054
                                            temozolomide 3053
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