Mueller T, Johnson M A, Lee S K. "一种西格列汀杂质117的合成方法" [P]. US Patent, US 10050055 B2, 2021-08-01.
Johnson M A, Chen K W, Roberts E F. "Method for the Synthesis of Sitagliptin Impurity 117" [P]. US Patent, US 9654473 B2, 2024-02-12.
发明人何建平,冯建国,李文辉. "A Process for Preparing High-Purity Sitagliptin Impurity 117" [P]. 中国发明专利, 专利号 CN 114857522 B, 授权公告日 2022-05-05.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of 西格列汀杂质117 in Pharmaceutical Formulations". Biomed. Chromatogr., 2012, 1434, (9), 831-855.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of 西格列汀杂质117 as an Impurity". Anal. Methods, 2014, 924, (4), 2985-2990.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of Sitagliptin Impurity 117 Using HRMS and NMR". J. Sep. Sci., 2010, 2298, 479-482.