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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:17997 term browser browse the term
Definition:An elemental molecule consisting of two trivalently-bonded nitrogen atoms.
Synonyms:related_synonym: Formula=N2;   InChI=1S/N2/c1-2;   InChIKey=IJGRMHOSHXDMSA-UHFFFAOYSA-N;   N#N;   N2;   Nitrogen;   SMILES=N#N;   molecular nitrogen
 alt_id: CHEBI:13388;   CHEBI:14660;   CHEBI:25365;   CHEBI:43128;   CHEBI:7593
 xref: CAS:7727-37-9;   Drug_Central:4251;   Gmelin:150;   HMDB:HMDB0001371;   KEGG:C00697;   KEGG:D00083
 xref_mesh: MESH:D009584
 xref: MetaCyc:NITROGEN-MOLECULE;   PDBeChem:HDZ;   PMID:18334638;   PMID:22237545;   Reaxys:15940095;   Wikipedia:Nitrogen
 cyclic_relationship: is_conjugate_base_of CHEBI:30102

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Path 1
Term Annotations click to browse term
  CHEBI ontology 909
    chemical entity 909
      molecular entity 907
        main group molecular entity 861
          gas molecular entity 289
            dinitrogen 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 909
    subatomic particle 894
      composite particle 894
        hadron 894
          baryon 894
            nucleon 894
              atomic nucleus 894
                atom 894
                  main group element atom 863
                    p-block element atom 860
                      pnictogen 355
                        pnictogen molecular entity 355
                          elemental pnictogen 0
                            elemental nitrogen 0
                              diatomic nitrogen 0
                                dinitrogen 0
paths to the root