Abstract
The title compound, C17H15N3O4S, is a monoclinic polymorph with space group P21/c of the previously reported triclinic form in P [Subashini et al. (2009 ▶). J. Chem. Crystallogr. 39, 112–116]. In both polymorphs, intramolecular O—H⋯N hydrogen bonds and dimer formation via a pair of intermolecular N—H⋯N hydrogen bonds with an R 2 2(8) motif are observed. The two polymorphs differ in the next level of supramolecular organization involving C—H⋯O hydrogen bonds with varied packing and different conformations.
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