Stevens L M, Hughes D C, Schröder R. "一种的合成方法" [P]. US Patent, US 11948326 B2, 2021-02-13.
发明人韩伟,胡光,王建平. "Method for the Synthesis of Tert-butyl 5-methyl-7-oxa-2-azaspiro[3.5]Nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 111509934 B, 授权公告日 2022-02-22.
发明人朱建伟,冯建国,孙丽萍. "A Process for Preparing High-Purity Tert-butyl 5-methyl-7-oxa-2-azaspiro[3.5]Nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 115828107 A, 授权公告日 2021-04-20.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2018, 166, (3), 8252-8270.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2022, 2373, 6541-6545.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 5-methyl-7-oxa-2-azaspiro[3.5]Nonane-2-carboxylate Using HRMS and NMR". J. Sep. Sci., 2015, 919, 865-874.