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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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Path 1
Term Annotations click to browse term
  CHEBI ontology 19785
    chemical entity 19785
      group 19696
        inorganic group 19146
          sulfo group 5731
            organosulfonic acid 5731
              amino sulfonic acid 408
                aminonaphthalenesulfonic acid 0
                  naphthionic acid 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19785
    subatomic particle 19782
      composite particle 19782
        hadron 19782
          baryon 19782
            nucleon 19782
              atomic nucleus 19782
                atom 19782
                  main group element atom 19670
                    p-block element atom 19670
                      chalcogen 19360
                        oxygen atom 19321
                          oxygen molecular entity 19321
                            hydroxides 19066
                              oxoacid 18192
                                chalcogen oxoacid 11479
                                  sulfur oxoacid 11082
                                    sulfonic acid 7331
                                      sulfo group 5731
                                        organosulfonic acid 5731
                                          arenesulfonic acid 674
                                            naphthalenesulfonic acid 44
                                              aminonaphthalenesulfonic acid 0
                                                naphthionic acid 0
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