Abstract
In the title compound, C17H15N3O5S center dot C2H6OS, the thiazine ring adopts a distorted half-chair conformation. The enolic H atom is involved in both intramolecular and intermolecular O-H center dot center dot center dot 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.