1,3-Naphthalenedisulfonic acid, 7-((4-((4-((4-aminobenzoyl)amino)-2-methylphenyl)azo)-2-methylphenyl)azo)- 63216-82-0 7-((4-((4-(p-Aminobenzamido)-o-tolyl)azo)-o-tolyl)azo)-1,3-naphthalenedisulfonic acid