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4-[(8-Amino-1-hydroxy-5-sodiosulfo-2-naphthalenyl)azo]-4'-[(2-phenylamino-1-naphthalenyl)azo]-1,1'-biphenyl-3,3'-dicarboxylic acid disodium salt Structure

4-[(8-Amino-1-hydroxy-5-sodiosulfo-2-naphthalenyl)azo]-4'-[(2-phenylamino-1-naphthalenyl)azo]-1,1'-biphenyl-3,3'-dicarboxylic acid disodium salt