3-[4-[4-[(1-Hydroxy-3-sulfo-7-amino-2-naphtyl)azo]phenylazo]phenylazo]-4-hydroxy-5-aminonaphthalene-2,7-disulfonic acid

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

5-Amino-3-[[4-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]phenyl]azo]phenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonic acid