发明人赵玉洁,杨光,张德明. "Method for the Synthesis of N-(6-Methyl-2-pyridyl)-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxamide 1,1-Dioxide" [P]. 中国发明专利, 专利号 CN 109940590 A, 授权公告日 2017-01-19.
发明人刘建华,唐晓军,郭海燕. "A Process for Preparing High-Purity N-(6-Methyl-2-pyridyl)-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxamide 1,1-Dioxide" [P]. 中国发明专利, 专利号 CN 108982987 A, 授权公告日 2018-04-16.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2014, 2102, (1), 9589-9602.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2016, 1858, 8469-8478.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of N-(6-Methyl-2-pyridyl)-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxamide 1,1-Dioxide Using HRMS and NMR". J. Sep. Sci., 2021, 508, (3), 1829-1857.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2025, 1436, (12), 5991-6015.