2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-4-4-(4-hydroxyphenyl)azophenylamino-3-sulfophenylazo-6-(phenylazo)-

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

4-amino-5-hydroxy-3-[[4-[[4-[(4-hydroxyphenyl)azo]phenyl]amino]-3-sulphophenyl]azo]-6-(phenylazo)naphthalene-2,7-disulphonic acid