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7-[[4-[[4-[(4-Aminobenzoyl)amino]-2-methylphenyl]azo]-2-methylphenyl]azo]-1,3-naphthalenedisulfonic acid disodium salt Structure

7-[[4-[[4-[(4-Aminobenzoyl)amino]-2-methylphenyl]azo]-2-methylphenyl]azo]-1,3-naphthalenedisulfonic acid disodium salt