Chen K W, Kumar R, Brown S R. "Method for the Synthesis of tert-butyl 2-(2-oxoethyl)-7-azaspiro[3.5]nonane-7-carboxylate" [P]. US Patent, US 9659850 B2, 2023-01-26.
Nielsen H, Nowak P, Mueller T C. "A Process for Preparing High-Purity tert-butyl 2-(2-oxoethyl)-7-azaspiro[3.5]nonane-7-carboxylate" [P]. European Patent, EP 3661141 A1, 2024-10-27.
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. Chem., 2011, 1170, 8922-8932.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2014, 1429, (3), 5788-5803.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of tert-butyl 2-(2-oxoethyl)-7-azaspiro[3.5]nonane-7-carboxylate Using HRMS and NMR". Food Chem., 2023, 989, 3649-3678.