119-77-7 2-Naphthalenesulfonic acid, 7-(p-aminobenzamido)-4-hydroxy- 2-Naphthalenesulfonic acid, 7-[(4-aminobenzoyl)amino]-4-hydroxy- 7-(p-Aminobenzamido)-4-hydroxy-2-naphthalenesulfonic acid NSC1742 PAB J Acid p-Aminobenzoyl I Acid p-Aminobenzoyl J Acid