发明人韩伟,何建平,马晓峰. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 114536616 A, 授权公告日 2017-12-21.
发明人马晓峰,黄志刚,赵玉洁. "Method for the Synthesis of Tert-butyl 7,7-difluoro-2,9-diazaspiro[5.5]Undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 111182806 A, 授权公告日 2021-03-21.
发明人杨光,高志强,林芳. "A Process for Preparing High-Purity Tert-butyl 7,7-difluoro-2,9-diazaspiro[5.5]Undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 111201614 B, 授权公告日 2016-02-24.
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". Anal. Chem., 2015, 523, 458-474.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2022, 686, (6), 4349-4364.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 7,7-difluoro-2,9-diazaspiro[5.5]Undecane-9-carboxylate Using HRMS and NMR". Environ. Sci. Technol., 2014, 912, 4456-4478.
Wang L, Li J, Zhang H. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2021, 801, (1), 1870-1900.