Hughes D C, Williams B T, Fischer A B. "一种的合成方法" [P]. US Patent, US 11311901 B2, 2016-03-11.
Patel M V, Chen K W, Williams B T. "Method for the Synthesis of 7-Methyl-7-azaspiro[3.5]Nonane-2-carboxylic acid" [P]. US Patent, US 11033151 B2, 2024-09-25.
发明人韩伟,郑宇鹏,何建平. "A Process for Preparing High-Purity 7-Methyl-7-azaspiro[3.5]Nonane-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109457842 B, 授权公告日 2023-09-17.
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". Anal. Methods, 2018, 1561, (1), 9778-9800.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2020, 1273, (4), 3077-3107.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 7-Methyl-7-azaspiro[3.5]Nonane-2-carboxylic acid Using HRMS and NMR". Chemosphere, 2012, 2054, (12), 6042-6064.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2014, 1423, 1369-1375.