发明人沈红梅,王建平,林芳. "一种利格列汀杂质139的合成方法" [P]. 中国发明专利, 专利号 CN 116061379 A, 授权公告日 2019-09-17.
发明人唐晓军,徐明华,罗永刚. "Method for the Synthesis of Linagliptin impurity 139" [P]. 中国发明专利, 专利号 CN 109589538 B, 授权公告日 2023-05-01.
发明人李文辉,胡光,杨光. "A Process for Preparing High-Purity Linagliptin impurity 139" [P]. 中国发明专利, 专利号 CN 109983372 A, 授权公告日 2021-07-07.
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 利格列汀杂质139 in Pharmaceutical Formulations". Phytochemistry, 2015, 1758, 6035-6065.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of 利格列汀杂质139 as an Impurity". Food Chem., 2010, 693, (9), 6968-6996.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of Linagliptin impurity 139 Using HRMS and NMR". J. Pharm. Biomed. Anal., 2011, 107, 2441-2467.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate 利格列汀杂质139 Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2012, 2422, 5053-5083.