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

In the title mol­ecule, C₁₈H₁₇N₅O₃S₂, the heterocyclic thia­zine ring adopts a twist boat conformation, with the S and N atoms displaced by 0.480 (7) and 0.205 (8) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. The pyrazole and benzene rings are tilted at an angle of 10.9 (2)° with respect to one another. The crystal structure is stabilized by inter­molecular N—H...O and C—H...N hydrogen bonds, resulting in dimers forming nine-membered rings of graph-set motif R₂²(9). In addition, inter­molecular C—H...O inter­actions result in chains of mol­ecules along the c axis, further consolidating the crystal packing.