4-Hydroxy-2-methyl-N-[4-(trifluoromethyl)phenyl]-2H-1,2-benzothia zine-3-carboxamide 1,1-dioxide

4-hydroxy-2-methyl-1,1-dioxo-N-phenyl-1λ⁶,2-benzothiazine-3-carboxamide

N-(4-Chlorophenyl)-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carb oxamide 1,1-dioxide

4-Hydroxy-2-methyl-N-[3-(trifluoromethyl)phenyl]-2H-1,2-benzothia zine-3-carboxamide 1,1-dioxide

3-methyl-1,2-benzothiazole 1,1-dioxide