132-88-7 2-Naphthalenesulfonic acid, 4-hydroxy-7-(p-nitrobenzamido)- 2-Naphthalenesulfonic acid, 4-hydroxy-7-[(4-nitrobenzoyl)amino]- 2-Naphthalenesulfonic acid, 7-(p-nitrobenzamido)-4-hydroxy- 4-Aminobenxoyl J Pure 4-Nitrobenzoyl J acid NSC37170