Acta Cryst. (2012). E68, o3064-o3065 [ doi:10.1107/S1600536812040226 ]
Abstract: 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) Å 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)° in the two molecules and the equivalent torsion angles in the N-methylacetamide chains connecting the ring systems also differ. In the crystal, N-HO hydrogen bonds connect the components into C(4)  chains of alternating A and B molecules. The packing is consolidated by weak C-HO interactions, which generate a three-dimensional network.
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