4-hydroxy-3-[[4-[(2-hydroxy-7-sulpho-1-naphthyl)azo]-2,5-dimethoxyphenyl]azo]-8-[(4-sulphobenzoyl)amino]naphthalene-2-sulphonic acid

4-Hydroxy-3-[[4-[(2-hydroxy-7-sulfo-1-naphthalenyl)azo]-2,5-dimethoxyphenyl]azo]-8-[(4-sulfobenzoyl)amino]-2-naphthalenesulfonic acid