发明人沈红梅,徐明华,唐晓军. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 114162396 A, 授权公告日 2017-04-25.
发明人胡光,冯建国,唐晓军. "Method for the Synthesis of tert-Butyl 2,4-dioxo-1,9-diazaspiro[5.5]undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 115996416 A, 授权公告日 2016-12-07.
发明人林芳,钱学锋,郑宇鹏. "A Process for Preparing High-Purity tert-Butyl 2,4-dioxo-1,9-diazaspiro[5.5]undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 117679676 A, 授权公告日 2022-10-28.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2013, 336, 2435-2446.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2018, 624, (4), 8673-8703.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 2,4-dioxo-1,9-diazaspiro[5.5]undecane-9-carboxylate Using HRMS and NMR". J. Chromatogr. A, 2011, 615, 9573-9586.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2012, 1882, (12), 6856-6868.