2-(3,4-Dimethyl-5,5-dioxo-2H, 4H-pyrazolo[4,3-c][1,2]benzothiazin-2-yl)-N-(3-methoxybenzyl)acetamide

The asymmetric unit of the title compound, C21H22N4O4S, contains two molecules (A and B), in which the thiazine rings adopt an S-envelope conformation with the S atoms displaced by 0.621 (2) and 0.697 (2)angstrom from the mean planes formed by the remaining ring atoms. The dihedral angles between the N-methylacetamide groups and the methoxybenzene rings are 8.67 (10) and 54.49 (6)degrees in the two molecules and the equivalent torsion angles in the N-methylacetamide chains connecting the ring systems also differ. In the crystal, N-H center dot center dot center dot O hydrogen bonds connect the components into C(4) [100] chains of alternating A and B molecules. The packing is consolidated by weak C-H center dot center dot center dot O interactions, which generate a three-dimensional network.