Patel M V, Kumar R, Fischer A B. "Method for the Synthesis of 4-Methyl-1-oxa-4-azaspiro[4.4]nonane" [P]. US Patent, US 10649103 B2, 2017-10-15.
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. Chromatogr. A, 2014, 1271, (6), 1230-1251.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2018, 118, (8), 5247-5253.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 4-Methyl-1-oxa-4-azaspiro[4.4]nonane Using HRMS and NMR". Talanta, 2016, 426, 2021-2036.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2024, 2458, (3), 8378-8405.