4-Hydroxy-2-methyl-N-2-pyridinyl-2H-1,2-benzothiazine-3-carboxamide 1,1-Dioxide; 2H-1,2-Benzothiazine-3-carboxamide, 4-hydroxy-2-methyl-N-2-pyridinyl-,1,1-dioxide; 4-Hydroxy-2-methyl-N-2-pyridyl-2H -1,2-benzothiazine-3-carboxamide 1,1-dioxide (USP);4-Hydroxy-2-methyl-3-(2-pyridylcarbamoyl)-2H-1,2-benzothiazine 1,1-Dioxide ;