N-Benzenesulfonyl H acid

4-hydroxy-5-(phenylsulfonamido)naphthalene-2,7-disulfonicacid

5-Phenylsulfonylamino-4-hydroxy-2,7-naphthalenedisulfonic acid

2,7-Naphthalenedisulfonic acid, 4-benzenesulfonamido-5-hydroxy-

4-hydroxy-5-(phenylsulfonylamino)naphthalene-2,7-disulfonic acid

4-Hydroxy-5-(phenylsulfonylamino)-2,7-naphthalenedisulfonic acid