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5-[[4'-[[8-Amino-1-hydroxy-7-[(4-nitrophenyl)azo]-3,6-disulfonaphthalen-2-yl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid Structure

5-[[4'-[[8-Amino-1-hydroxy-7-[(4-nitrophenyl)azo]-3,6-disulfonaphthalen-2-yl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid