N-[2-(Amino­carbon­yl)phen­yl]-4-hydr­oxy-2-methyl-2H-1,2-benzothia­zine-3-carboxamide 1,1-dioxide dimethyl sulfoxide solvate

In the title compound, C17H15N3O5S·C2H6OS, the thia­zine ring adopts a distorted half-chair conformation. The enolic H atom is involved in both intra­molecular and inter­molecular O—H⋯O hydrogen bonds, the latter linking the mol­ecules into centrosymmetric pairs. Both anthranilamide H atoms are involved in hydrogen bonding to O atoms of dimethyl sulfoxide mol­ecules, linking the pairs of mol­ecules into chains.