5-Acetylamino-4-hydroxy-3-[(3-phosphonophenyl)azo]-2,7-naphthalenedisulfonic acid

5-(Acetylamino)-4-hydroxy-3-[(3-phosphonophenyl)azo]-2,7-naphthalenedisulfonic acid

5-(acetylamino)-4-hydroxy-3-[(3-phosphonophenyl)azo]naphthalene-2,7-disulphonic acid