N-Butyl-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide

The title compound, C14H18N2O4S, contains hydrogen-bonded dimeric pairs of molecules arranged around inversion centers, forming 14-membered rings with an R 2 2(14) motif. The structure is stabilized by extensive intramolecular interactions. The thiazine ring adopts a half-chair conformation, with the S and N atoms displaced by −0.485 (3) and 0.296 (3) Å, respectively, from the plane formed by the remaining atoms of the ring.

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