ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, vol.65, 2009 (SCI-Expanded)
The molecule of the title compound, C16H17N3O5S, crystallizes in a zwitterionic form, with a strong intramolecular N-H center dot center dot center dot O hydrogen bond. The dihedral angle between the two benzene rings is 7.06 (9)degrees. In the crystal, molecules are linked into chains along the c axis by intermolecular N-H center dot center dot center dot O hydrogen bonds.