1-Naphthalenesulfonic acid, 7-((4-aminobenzoyl)amino)-3-hydroxy- 2-(4'-Aminobenzamido)-6-naphthol-8-sulfonic acid 2-(4'-Aminobenzoylamino)-6-naphthol-8-sulfonic acid 68227-71-4 7-((4-Aminobenzoyl)amino)-3-hydroxynaphthalene-1-sulphonic acid EINECS 269-383-1