N′-(2-Chlorobenzylidene)-2-(3,4-dimethyl-5,5-dioxo-2H,4H-pyrazolo[4,3-c][1,2]benzothiazin-2-yl)acetohydrazide

The asymmetric unit of the title compound, C20H18ClN5O3S, contains two independent molecules with significantly different conformations of the heterocyclic thiazine rings. In both molecules, the thiazine rings adopt half-chair conformations, with the S atoms displaced by 0.382 (3) and 0.533 (3) Å and N atoms −0.351 and −0.275 Å, respectively, from the planes formed by the remaining ring atoms. The crystal structure is stabilized by weak intermolecular N—H⋯O and C—H⋯O interactions.