发明人唐晓军,罗永刚,刘建华. "Method for the Synthesis of Tiotropium Bromide Impurity 20" [P]. 中国发明专利, 专利号 CN 111951426 A, 授权公告日 2025-04-15.
发明人何建平,林芳,黄志刚. "A Process for Preparing High-Purity Tiotropium Bromide Impurity 20" [P]. 中国发明专利, 专利号 CN 112447437 A, 授权公告日 2025-01-20.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of 噻托溴铵杂质20 in Pharmaceutical Formulations". Sci. Total Environ., 2016, 1138, 4710-4733.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of 噻托溴铵杂质20 as an Impurity". J. Agric. Food Chem., 2020, 385, (6), 7529-7557.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of Tiotropium Bromide Impurity 20 Using HRMS and NMR". Talanta, 2015, 1593, (11), 6835-6848.