2-Naphthalenesulfonic acid, 3-[(2-amino-6-sulfo-1-naphthalenyl) azo]-4-hydroxy-7-[[[(5-hydroxy-6-[(2-methoxyphenyl)azo]-7-sulfo- 2-naphthalenyl)amino]carbonyl]-, trisodium salt 7147-79-7 NSC45622