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CHEBI ONTOLOGY - ANNOTATIONS

The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/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.

Term:pyrimidine nucleobase
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Accession:CHEBI:26432 term browser browse the term
Definition:A nucleobase whose skeleton is derived from pyrimidine.
Synonyms:related_synonym: Formula=C4HN2R4;   SMILES=N1C(=C(C(=NC1=*)*)*)*;   a pyrimidine nucleobase;   pyrimidine bases;   pyrimidine nucleobases


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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 19816
    chemical entity 19816
      atom 19814
        nonmetal atom 19690
          nitrogen atom 18565
            nitrogen molecular entity 18565
              organonitrogen compound 18338
                organonitrogen heterocyclic compound 17485
                  nucleobase 10194
                    pyrimidine nucleobase 6094
                      2-amino-4-hydroxypyrimidine + 0
                      alpha-putrescinylthymine 0
                      cytosine + 942
                      pyrimidine 2'-deoxyribonucleoside 5'-phosphate(2-) + 0
                      thymine + 70
                      uracil + 5648
Path 2
Term Annotations click to browse term
  CHEBI ontology 19816
    subatomic particle 19814
      composite particle 19814
        hadron 19814
          baryon 19814
            nucleon 19814
              atomic nucleus 19814
                atom 19814
                  main group element atom 19702
                    p-block element atom 19702
                      carbon group element atom 19608
                        carbon atom 19597
                          organic molecular entity 19597
                            organic molecule 19522
                              organic cyclic compound 19320
                                organic heterocyclic compound 18432
                                  organic heteromonocyclic compound 16469
                                    diazines 12154
                                      pyrimidines 11972
                                        pyrimidine nucleobase 6094
                                          2-amino-4-hydroxypyrimidine + 0
                                          alpha-putrescinylthymine 0
                                          cytosine + 942
                                          pyrimidine 2'-deoxyribonucleoside 5'-phosphate(2-) + 0
                                          thymine + 70
                                          uracil + 5648
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