Park J H, Brown S R, Kumar R. "一种的合成方法" [P]. US Patent, US 11300635 B2, 2017-01-21.
Schröder R, Sørensen M, Nielsen H. "Method for the Synthesis of tert-Butyl6-oxo-1-azaspiro[4.4]nonane-1-carboxylate" [P]. European Patent, EP 3274275 A1, 2016-12-22.
发明人林芳,高志强,孙丽萍. "A Process for Preparing High-Purity tert-Butyl6-oxo-1-azaspiro[4.4]nonane-1-carboxylate" [P]. 中国发明专利, 专利号 CN 109956547 A, 授权公告日 2019-01-10.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2017, 462, (7), 8792-8807.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2022, 1533, 3509-3539.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl6-oxo-1-azaspiro[4.4]nonane-1-carboxylate Using HRMS and NMR". Chemosphere, 2017, 2343, (4), 6269-6274.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Food Chem., 2021, 739, (9), 6178-6192.