Yamamoto T, Chen K W, Brown S R. "一种的合成方法" [P]. US Patent, US 9191218 B2, 2020-10-11.
发明人张德明,胡光,孙丽萍. "Method for the Synthesis of 2-(Tert-butoxycarbonyl)-5-oxa-2-azaspiro[3.4]Octane-8-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110848042 B, 授权公告日 2022-06-14.
发明人冯建国,罗永刚,唐晓军. "A Process for Preparing High-Purity 2-(Tert-butoxycarbonyl)-5-oxa-2-azaspiro[3.4]Octane-8-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110673868 A, 授权公告日 2018-10-18.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2021, 2447, 361-374.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2011, 1641, 3957-3979.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 2-(Tert-butoxycarbonyl)-5-oxa-2-azaspiro[3.4]Octane-8-carboxylic acid Using HRMS and NMR". J. Nat. Prod., 2015, 2261, 9672-9702.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2010, 1070, (3), 66-88.