Yamamoto T, Klinger H, Fischer A B. "Method for the Synthesis of Methyl 8-oxa-2-azaspiro[4.5]Decane-4-carboxylate" [P]. US Patent, US 9802232 B2, 2020-04-11.
Stevens L M, Williams B T, Hughes D C. "A Process for Preparing High-Purity Methyl 8-oxa-2-azaspiro[4.5]Decane-4-carboxylate" [P]. US Patent, US 11671012 B2, 2019-10-03.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2017, 1068, (1), 4893-4922.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2013, 235, 9472-9479.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 8-oxa-2-azaspiro[4.5]Decane-4-carboxylate Using HRMS and NMR". Anal. Chem., 2014, 1182, (8), 2319-2328.