发明人韩伟,何建平,唐晓军. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 110423300 A, 授权公告日 2015-12-03.
发明人徐明华,高志强,钱学锋. "Method for the Synthesis of Tert-butyl 9-(2-ethoxy-2-oxoethylidene)-3-azaspiro[5.5]Undecane-3-carboxylate" [P]. 中国发明专利, 专利号 CN 115110253 A, 授权公告日 2021-02-11.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2021, 741, (6), 6039-6045.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2020, 1031, 9366-9391.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 9-(2-ethoxy-2-oxoethylidene)-3-azaspiro[5.5]Undecane-3-carboxylate Using HRMS and NMR". Anal. Methods, 2019, 1039, (12), 630-656.