英文别名Piroxicam EP Impurity I; 4-Hydroxy-2H-1,2-benzothiazine-3-carboxylic acid 1-methylethyl ester 1,1-dioxide; NSC 642708; 4-Hydroxy-1,1-dioxo-1,2-dihydro-1lambda6-benzo[e][1,2]thiazine-3-carboxylic acid isopropyl ester; propan-2-yl 4-hydroxy-1,1-dioxo-2H-1λ6,2-benzothiazine-3-carboxylate; 1-Methylethyl 4-Hydroxy-2H-1,2-benzothiazine-3-carboxylate 1,1-Dioxide 
