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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:naphthionic acid
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Accession:CHEBI:38219 term browser browse the term
Definition:An aminonaphthalenesulfonic acid that has formula C10H9NO3S.
Synonyms:exact_synonym: 4-aminonaphthalene-1-sulfonic acid
 related_synonym: 1-naphthylamine-4-sulfonic acid;   4-Aminonaphthalin-1-sulfonsaeure;   4-amino-1-naphthalene sulfonic acid;   Formula=C10H9NO3S;   InChI=1S/C10H9NO3S/c11-9-5-6-10(15(12,13)14)8-4-2-1-3-7(8)9/h1-6H,11H2,(H,12,13,14);   InChIKey=NRZRRZAVMCAKEP-UHFFFAOYSA-N;   Naphthionsaeure;   Piria's acid;   Piria-Saeure;   SMILES=Nc1ccc(c2ccccc12)S(O)(=O)=O;   alpha-naphthylamine-4-sulfonic acid;   alpha-naphthylamine-p-sulfonic acid
 xref: Beilstein:1971299;   CAS:84-86-6;   Gmelin:241888

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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 24374
    chemical entity 24342
      group 24225
        inorganic group 23013
          sulfo group 6053
            organosulfonic acid 6053
              amino sulfonic acid 409
                aminonaphthalenesulfonic acid 0
                  naphthionic acid 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 24374
    subatomic particle 24331
      composite particle 24331
        hadron 24331
          baryon 24331
            nucleon 24331
              atomic nucleus 24331
                atom 24331
                  main group element atom 24177
                    p-block element atom 24177
                      chalcogen 23204
                        oxygen atom 23077
                          oxygen molecular entity 23077
                            hydroxides 22319
                              oxoacid 21451
                                chalcogen oxoacid 12216
                                  sulfur oxoacid 11779
                                    sulfonic acid 7686
                                      sulfo group 6053
                                        organosulfonic acid 6053
                                          arenesulfonic acid 685
                                            naphthalenesulfonic acid 44
                                              aminonaphthalenesulfonic acid 0
                                                naphthionic acid 0
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