CAS 113913-36-3 appears in our catalog under these names: Piroxicam Impurity 16, 2H-1,2-Benzothiazine-3-carboxylic acid, 3,4-dihydro-4-hydroxy-2-methyl-, ethyl ester, 1,1-dioxide, 95%, 3,4-Dihydro-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylic acid ethyl ester 1,1-dioxide, Meloxicam Impurity 1（Meloxicam EP Impurity A）, Piroxicam Impurity 11（Piroxicam EP Impurity K）. Offered by: Chemat Brand, AmBeed, Biosynth, Hubei YoungXin. Available pack sizes: on request, 250mg, 1g, 5g, 2g, 10g, 25g, 10mg.