发明人郭海燕,冯建国,韩伟. "Method for the Synthesis of Tert-butyl 4,4-difluoro-7-oxo-2,8-diazaspiro[5.5]Undecane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 108713206 B, 授权公告日 2024-09-11.
发明人朱建伟,张德明,唐晓军. "A Process for Preparing High-Purity Tert-butyl 4,4-difluoro-7-oxo-2,8-diazaspiro[5.5]Undecane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 114520171 B, 授权公告日 2023-08-24.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2023, 1855, (6), 9463-9483.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2017, 1873, 4119-4149.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 4,4-difluoro-7-oxo-2,8-diazaspiro[5.5]Undecane-2-carboxylate Using HRMS and NMR". Molecules, 2021, 821, (12), 3849-3852.