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5-[[4'-[[8-Amino-1-hydroxy-5-sulfo-7-[(2,5-disulfophenyl)azo]-2-naphtyl]azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-2-hydroxybenzoic acid tetrasodium salt Structure

5-[[4'-[[8-Amino-1-hydroxy-5-sulfo-7-[(2,5-disulfophenyl)azo]-2-naphtyl]azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-2-hydroxybenzoic acid tetrasodium salt