disodium 2,2'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis[imino[1-(1-hydroxyethylidene)-2-oxoethylene]azo]]bis[5-acetamidobenzoate]

2,2'-[(3,3'-Dimethyl-1,1'-biphenyl-4,4'-diyl)bis[imino[1-(1-hydroxyethylidene)-2-oxo-2,1-ethanediyl]azo]]bis[5-(acetylamino)benzoic acid]disodium salt