Klinger H, Davis P L, Williams B T. "一种的合成方法" [P]. US Patent, US 10955154 B2, 2015-03-18.
Hughes D C, Schröder R, Stevens L M. "Method for the Synthesis of 2-Oxa-7-azaspiro[4.4]Nonane-4-carboxylic acid" [P]. US Patent, US 9927660 B2, 2024-10-23.
发明人王建平,陈志强,何建平. "A Process for Preparing High-Purity 2-Oxa-7-azaspiro[4.4]Nonane-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109810916 B, 授权公告日 2016-11-02.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2012, 515, (6), 540-548.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2013, 2380, 4906-4926.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of 2-Oxa-7-azaspiro[4.4]Nonane-4-carboxylic acid Using HRMS and NMR". Molecules, 2012, 2146, (9), 5043-5046.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2022, 182, 6737-6752.