2-[[1-[[[4'-[2-[(4-Acetamido-2-carboxyphenyl)azo]acetoacetamido]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]amino]carbonyl]-2-oxopropyl]azo]-5-[[(4-sulphoanilino)carbonyl]amino]benzoic acid,sodium salt
2-[[1-[[[4'-[2-[(4-Acetamido-2-carboxyphenyl)azo]acetoacetamido]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]amino]carbonyl]-2-oxopropyl]azo]-5-[[(4-sulphoanilino)carbonyl]amino]benzoic acid,sodium salt