Fischer A B, Lee S K, Chen K W. "Method for the Synthesis of Sitagliptin Impurity 55" [P]. US Patent, US 10782937 B2, 2018-08-04.
发明人李文辉,陈志强,沈红梅. "A Process for Preparing High-Purity Sitagliptin Impurity 55" [P]. 中国发明专利, 专利号 CN 113720479 B, 授权公告日 2023-03-21.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of Sitagliptin Impurity55 in Pharmaceutical Formulations". Molecules, 2013, 1821, (11), 1988-2000.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of Sitagliptin Impurity55 as an Impurity". Talanta, 2022, 206, (9), 3192-3205.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Sitagliptin Impurity 55 Using HRMS and NMR". J. Pharm. Biomed. Anal., 2012, 1190, (5), 5169-5181.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate Sitagliptin Impurity55 Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2013, 1985, 3572-3588.