5-amino-3-[[4-[[4-[(6-amino-1-hydroxy-3-sulpho-2-naphthyl)azo]phenyl]azo]phenyl]azo]-4-hydroxynaphthalene-2,7-disulphonic acid

5-Amino-3-[[4-[[4-[(6-amino-1-hydroxy-3-sulfonaphthalen-2-yl)azo]phenyl]azo]phenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonic acid