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5-Amino-3-[[4'-[(4-amino-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]-4-hydroxynaphthalene-2,7-disulfonic acid disodium salt Structure

5-Amino-3-[[4'-[(4-amino-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]-4-hydroxynaphthalene-2,7-disulfonic acid disodium salt