... -2-methyl-N- (5-methyl-1, 3-thiazol-2-yl)-2H-1, 2-benzothiazine-3-carboxamide 1,1-dioxide ≤ 0.05% No trace Methyl 4-hydroxy-2-methyl ... -2H-1, 2-benzothiazine-3-carboxylate 1,1-dioxide ≤ 0.1% No trace 4-hydroxy-2-methyl-N-methyl-N- (5-methyl-1, 3-thiazol-2 ... -yl)-2H-1, 2-benzothiazine-3-carboxamide 1,1-dioxide ...