Kumar R, Hughes D C, Stevens L M. "一种的合成方法" [P]. US Patent, US 9865931 B2, 2023-06-25.
发明人周伟,刘建华,高志强. "Method for the Synthesis of 4-Butyl-1-oxa-4,9-diazaspiro[5.5]undecane" [P]. 中国发明专利, 专利号 CN 109298899 B, 授权公告日 2015-05-11.
发明人李文辉,杨光,朱建伟. "A Process for Preparing High-Purity 4-Butyl-1-oxa-4,9-diazaspiro[5.5]undecane" [P]. 中国发明专利, 专利号 CN 108629650 B, 授权公告日 2021-11-07.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2013, 1325, (8), 5233-5259.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2017, 123, (9), 2649-2661.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 4-Butyl-1-oxa-4,9-diazaspiro[5.5]undecane Using HRMS and NMR". J. Chromatogr. A, 2022, 439, (12), 2181-2187.