4-Hydroxy-7-[[[[5-hydroxy-6-[(2-methoxy-4-sulfophenyl)azo]-7-sulfo-2-naphtyl]amino]carbonyl]amino]-3-[(6-sulfo-2-naphtyl)azo]-2-naphthalenesulfonic acid

4-hydroxy-7-[[[[5-hydroxy-6-[(2-methoxy-4-sulphophenyl)azo]-7-sulpho-2-naphthyl]amino]carbonyl]amino]-3-[(6-sulpho-2-naphthyl)azo]naphthalene-2-sulphonic acid