Thompson G K, Lee S K, Klinger H. "Method for the Synthesis of Tert-butyl 1-oxa-9-azaspiro[5.5]Undecane-9-carboxylate" [P]. US Patent, US 11120693 B2, 2019-11-26.
Sørensen M, Martínez F, Schröder R. "A Process for Preparing High-Purity Tert-butyl 1-oxa-9-azaspiro[5.5]Undecane-9-carboxylate" [P]. European Patent, EP 3443685 A1, 2015-07-24.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2024, 689, 2978-2989.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2013, 2057, (4), 5895-5902.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 1-oxa-9-azaspiro[5.5]Undecane-9-carboxylate Using HRMS and NMR". J. Chromatogr. A, 2016, 631, (2), 2437-2451.
Wang L, Li J, Zhang H. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2018, 876, (2), 1507-1534.