(4-Hydroxy-2-methyl-1,1-dioxobenzo[e]1,2-thiazin-3-yl)-N-(2-pyridyl)carboxamide 36322-90-4 4-Hydroxy-2-methyl-N-2-pyridinyl-2H-1,2-benzothiazine-3-carboxamide, 1,1-dioxide AIDS-071917 AIDS071917 NSC666076 Piroxicam