Stevens L M, Klinger H, Roberts E F. "一种利格列汀杂质90的合成方法" [P]. US Patent, US 10645422 B2, 2018-01-07.
发明人朱建伟,唐晓军,胡光. "Method for the Synthesis of Linagliptin Impurity 90" [P]. 中国发明专利, 专利号 CN 114759852 B, 授权公告日 2017-05-04.
发明人沈红梅,陈志强,王建平. "A Process for Preparing High-Purity Linagliptin Impurity 90" [P]. 中国发明专利, 专利号 CN 115555664 B, 授权公告日 2020-07-21.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of 利格列汀杂质90 in Pharmaceutical Formulations". Molecules, 2020, 708, 3891-3895.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of 利格列汀杂质90 as an Impurity". Talanta, 2020, 1572, (12), 7626-7653.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of Linagliptin Impurity 90 Using HRMS and NMR". Chemosphere, 2010, 391, (2), 9316-9325.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate 利格列汀杂质90 Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2011, 2041, (5), 8014-8044.