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Compound Synonyms > 2,7-Naphthalenedisulfonic acid,5-(2-(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)diazenyl)-4-hydroxy-3-(2-(4'-(2-(2-hydroxy-3,6-disulfo-1-naphthalenyl)diazenyl)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)diazenyl)-,sodium salt (1:4)