Martínez F, Schröder R, Rossi M. "一种的合成方法" [P]. European Patent, EP 3947855 A1, 2020-09-18.
Klinger H, Kumar R, Chen K W. "Method for the Synthesis of 9-(tert-Butoxycarbonyl)-1-oxa-9-azaspiro[5.5]undecane-3-carboxylic acid" [P]. US Patent, US 9661820 B2, 2024-05-16.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2024, 81, (5), 6518-6526.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2011, 631, 22-43.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 9-(tert-Butoxycarbonyl)-1-oxa-9-azaspiro[5.5]undecane-3-carboxylic acid Using HRMS and NMR". Phytochemistry, 2013, 576, 8448-8465.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2015, 1142, 406-428.