发明人朱建伟,罗永刚,林芳. "Method for the Synthesis of Ethyl 4-oxo-4-(3-(3-(thiophen-3-yl)-1,2,4-oxadiazol-5-yl)azetidin-1-yl)butanoate" [P]. 中国发明专利, 专利号 CN 110689646 A, 授权公告日 2021-05-27.
发明人张德明,黄志刚,赵玉洁. "A Process for Preparing High-Purity Ethyl 4-oxo-4-(3-(3-(thiophen-3-yl)-1,2,4-oxadiazol-5-yl)azetidin-1-yl)butanoate" [P]. 中国发明专利, 专利号 CN 113029828 B, 授权公告日 2024-08-26.
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". Anal. Chem., 2025, 2326, (9), 4866-4896.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2012, 1423, (7), 8588-8598.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 4-oxo-4-(3-(3-(thiophen-3-yl)-1,2,4-oxadiazol-5-yl)azetidin-1-yl)butanoate Using HRMS and NMR". J. Pharm. Biomed. Anal., 2018, 1843, 5032-5039.