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(2007/10/02)2-amino-1-hydroxybenzene-4-sulphonic acid-N-phenylamide
Butane-1,4-disulfonic acid bis-[(5-benzenesulfonylamino-2-hydroxy-phenyl)-amide]
Butane-1,4-disulfonic acid bis-({3-[(E)-benzenesulfonylimino]-6-oxo-cyclohexa-1,4-dienyl}-amide)