4-[(2-Hy­droxy­benzyl­idene)amino]-N-(5-methyl­isoxazol-3-yl)benzene­sulfonamide: a monoclinic polymorph

The title compound, C(17)H(15)N(3)O(4)S, is a monoclinic polymorph with space group P2(1)/c of the previously reported triclinic form in P [Image: see text] [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.