Chen K W, Patel M V, Park J H. "一种的合成方法" [P]. US Patent, US 10985420 B2, 2017-02-28.
发明人朱建伟,周伟,韩伟. "Method for the Synthesis of tert-Butyl 1,7-diazaspiro[3.5]nonane-7-carboxylate hemi(oxalic acid)" [P]. 中国发明专利, 专利号 CN 112632793 B, 授权公告日 2019-11-06.
发明人郑宇鹏,高志强,李文辉. "A Process for Preparing High-Purity tert-Butyl 1,7-diazaspiro[3.5]nonane-7-carboxylate hemi(oxalic acid)" [P]. 中国发明专利, 专利号 CN 108425440 B, 授权公告日 2020-03-11.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2010, 1064, (1), 9788-9794.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2010, 738, (8), 4431-4439.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 1,7-diazaspiro[3.5]nonane-7-carboxylate hemi(oxalic acid) Using HRMS and NMR". Chemosphere, 2012, 2148, (10), 3763-3781.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2014, 983, 9784-9794.