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4-[(1,7-Dihydroxy-6-(sodiooxycarbonyl)-3-sodiosulfo-2-naphthalenyl)azo]-4'-[(5-oxo-4,5-dihydro-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo]-1,1'-biphenyl-3,3'-dicarboxylic acid disodium salt Structure

4-[(1,7-Dihydroxy-6-(sodiooxycarbonyl)-3-sodiosulfo-2-naphthalenyl)azo]-4'-[(5-oxo-4,5-dihydro-3-methyl-1-phenyl-1H-pyrazol-4-yl)azo]-1,1'-biphenyl-3,3'-dicarboxylic acid disodium salt