Anderson J P, Lee S K, Stevens L M. "一种的合成方法" [P]. US Patent, US 10687514 B2, 2015-03-14.
发明人沈红梅,陈志强,刘建华. "Method for the Synthesis of 5-(Tert-butyl) 3-ethyl 4,4-dimethyl-2,4,6,7-tetrahydro-5H-pyrazolo[4,3-c]pyridine-3,5-dicarboxylate" [P]. 中国发明专利, 专利号 CN 109283734 A, 授权公告日 2023-08-20.
发明人王建平,马晓峰,徐明华. "A Process for Preparing High-Purity 5-(Tert-butyl) 3-ethyl 4,4-dimethyl-2,4,6,7-tetrahydro-5H-pyrazolo[4,3-c]pyridine-3,5-dicarboxylate" [P]. 中国发明专利, 专利号 CN 111062780 B, 授权公告日 2020-10-08.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Sci. Total Environ., 2014, 744, (6), 8663-8673.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2010, 1483, (11), 6184-6213.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 5-(Tert-butyl) 3-ethyl 4,4-dimethyl-2,4,6,7-tetrahydro-5H-pyrazolo[4,3-c]pyridine-3,5-dicarboxylate Using HRMS and NMR". J. Agric. Food Chem., 2016, 277, 4715-4738.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2020, 1214, (8), 9171-9186.