5-[[4-[[[4-[[8-amino-1-hydroxy-7-[(4-nitrophenyl)azo]-3,6-disulpho-2-naphthyl]azo]phenyl]amino]carbonyl]phenyl]azo]salicylic acid

1-Amino-7-[[4-[4-[(3-carboxy-4-hydroxyphenyl)azo]benzoylamino]phenyl]azo]-8-hydroxy-2-[(4-nitrophenyl)azo]-3,6-naphthalenedisulfonic acid

5-[[4-[[[4-[[8-Amino-1-hydroxy-7-[(4-nitrophenyl)azo]-3,6-disulfo-2-naphthalenyl]azo]phenyl]amino]carbonyl]phenyl]azo]-2-hydroxybenzoic acid