发明人马晓峰,郑宇鹏,周伟. "一种利拉利汀杂质28的合成方法" [P]. 中国发明专利, 专利号 CN 115727000 A, 授权公告日 2020-09-22.
发明人陈志强,郭海燕,韩伟. "Method for the Synthesis of Linagliptin Impurity 28" [P]. 中国发明专利, 专利号 CN 115096015 B, 授权公告日 2023-10-08.
Mueller T, Stevens L M, Roberts E F. "A Process for Preparing High-Purity Linagliptin Impurity 28" [P]. US Patent, US 9208302 B2, 2021-02-20.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of 利拉利汀杂质28 in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2022, 163, (4), 4137-4149.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of 利拉利汀杂质28 as an Impurity". Rapid Commun. Mass Spectrom., 2023, 775, (9), 2322-2345.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of Linagliptin Impurity 28 Using HRMS and NMR". Chromatographia, 2021, 2192, (7), 5580-5588.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate 利拉利汀杂质28 Profile in Drug Substances According to ICH Guidelines". Biomed. Chromatogr., 2010, 1099, 2708-2735.