2-Naphthalenesulfonic acid dr. 2-Naphthalenesulfonic acid, 4-hydroxy-7-[[[[5-hydroxy-6-[(4-methylphenyl)azo]-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-3-[(6-sulfo-2-naphthalenyl)azo]-, trisodium salt AIDS-030528 AIDS030528 NSC58056