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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.

Term:diphthamide zwitterion
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Accession:CHEBI:57580 term browser browse the term
Definition:A zwitterionic tautomer of diphthamide having an anionic carboxy group and a protonated primary amino group.
Synonyms:exact_synonym: (2S)-3-{2-[(3S)-4-amino-4-oxo-3-(trimethylazaniumyl)butyl]-1H-imidazol-4-yl}-2-azaniumylpropanoate
 related_synonym: Formula=C13H24N5O3;   InChI=1S/C13H23N5O3/c1-18(2,3)10(12(15)19)4-5-11-16-7-8(17-11)6-9(14)13(20)21/h7,9-10H,4-6,14H2,1-3H3,(H3-,15,16,17,19,20,21)/p+1/t9-,10+/m0/s1;   InChIKey=FOOBQHKMWYGHCE-UWVGGRQHSA-O;   SMILES=C[N+](C)(C)[C@@H](CCc1nc(C[C@H]([NH3+])C([O-])=O)c[nH]1)C(N)=O
 xref: Wikipedia:Diphthamide
 cyclic_relationship: is_tautomer_of CHEBI:15949

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  CHEBI ontology 21737
    chemical entity 21735
      molecular entity 21722
        ion 16633
          organic ion 8634
            organic cation 7456
              quaternary ammonium ion 5257
                diphthamide zwitterion 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 21737
    subatomic particle 21723
      composite particle 21723
        hadron 21723
          baryon 21723
            nucleon 21723
              atomic nucleus 21723
                atom 21723
                  main group element atom 21638
                    main group molecular entity 21638
                      s-block molecular entity 21174
                        hydrogen molecular entity 21111
                          hydrides 20360
                            inorganic hydride 18058
                              pnictogen hydride 18021
                                nitrogen hydride 17840
                                  ammonium 8105
                                    ammonium ion derivative 8101
                                      quaternary ammonium ion 5257
                                        diphthamide zwitterion 0
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