2-Acetamido-5-hydroxy-7-naphthalenesulfonic acid 2-Acetylamino-5-hydroxy-7-naphthalenesulfonic acid 2-Naphthalenesulfonic acid, 7-(acetylamino)-4-hydroxy- 2-Naphthalenesulfonic acid, 7-acetamido-4-hydroxy- 6334-97-0 NSC7567