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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 19787
    chemical entity 19787
      atom 19784
        nonmetal atom 19659
          nitrogen atom 18542
            nitrogen molecular entity 18542
              organonitrogen compound 18312
                organonitrogen heterocyclic compound 17461
                  nucleobase 10181
                    pyrimidine nucleobase 6083
                      2-amino-4-hydroxypyrimidine + 0
                      alpha-putrescinylthymine 0
                      cytosine + 941
                      pyrimidine 2'-deoxyribonucleoside 5'-phosphate(2-) + 0
                      thymine + 70
                      uracil + 5638
Path 2
Term Annotations click to browse term
  CHEBI ontology 19787
    subatomic particle 19784
      composite particle 19784
        hadron 19784
          baryon 19784
            nucleon 19784
              atomic nucleus 19784
                atom 19784
                  main group element atom 19672
                    p-block element atom 19672
                      carbon group element atom 19574
                        carbon atom 19563
                          organic molecular entity 19563
                            organic molecule 19488
                              organic cyclic compound 19285
                                organic heterocyclic compound 18410
                                  organic heteromonocyclic compound 16445
                                    diazines 12139
                                      pyrimidines 11956
                                        pyrimidine nucleobase 6083
                                          2-amino-4-hydroxypyrimidine + 0
                                          alpha-putrescinylthymine 0
                                          cytosine + 941
                                          pyrimidine 2'-deoxyribonucleoside 5'-phosphate(2-) + 0
                                          thymine + 70
                                          uracil + 5638
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