发明人徐明华,刘建华,黄志刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 110839052 A, 授权公告日 2025-04-28.
发明人钱学锋,罗永刚,孙丽萍. "Method for the Synthesis of 5-Ethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115323994 A, 授权公告日 2015-10-04.
发明人钱学锋,张德明,黄志刚. "A Process for Preparing High-Purity 5-Ethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115777670 A, 授权公告日 2016-11-16.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2015, 2138, 6915-6932.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2016, 1863, 9400-9404.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 5-Ethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxylic acid Using HRMS and NMR". Biomed. Chromatogr., 2024, 1394, (7), 1391-1395.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2011, 708, (1), 2144-2163.