2,7-Naphthalenedisulfonic acid, 4-amino-3-4-4-(2-amino-4-hydroxyphenyl)azophenylaminocarbonylphenylazo-5-hydroxy-6-(phenylazo)-, disodium salt

disodium 4-amino-3-[[4-[[[4-[(2-amino-4-hydroxyphenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate

4-Amino-3-[[4-[[[4-[(2-amino-4-hydroxyphenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid disodium salt