trisodium 7-[(4-aminobenzoyl)amino]-4-[[2,5-dimethoxy-4-[[7-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]phenyl]azo]-3-hydroxynaphthalene-1-sulphonate

7-[(4-Aminobenzoyl)amino]-4-[[2,5-dimethoxy-4-[[7-sulfo-4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]phenyl]azo]-3-hydroxy-1-naphthalenesulfonic acid trisodium salt