N'-[(E)-1-(4-Bromo-phen-yl)ethyl-idene]-4-hy-droxy-2-methyl-1,1-dioxo-2H-1,2-benzothia-zine-3-carbohydrazide.

The six-membered heterocycle in the title compound, C18H16BrN3O4S, adopts a sofa conformation. Intra­molecular N—H⋯N and O—H⋯O hydrogen bonds stabilize the mol­ecular conformation by forming a five- and a six-membered ring, respectively. The crystal packing is stabilized by inter­molecular C—H⋯O hydrogen bonds.