Ukrainets, I. V.; Petrushova, L. O.; Dzyubenko, S. P. Methyl-Substituted Anilides of 4-Hydroxy-1-Methyl-2,2-Dioxo-1H-2λ6,1-Benzothiazine-3-Carb-Oxylic Acid. Synthesis, Spectral Characteristics and Biological Properties. J. Org. Pharm. Chem. 2014, 12, 53-58.