6-amino-3-[[4-[(4-aminophenyl)azo]-6-methoxy-m-tolyl]azo]-4-hydroxynaphthalene-2-sulphonic acid

6-Amino-3-[[4-[(4-aminophenyl)azo]-2-methoxy-5-methylphenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid