Williams B T, Klinger H, Schröder R. "Method for the Synthesis of (2S,5S)-1-(((2S,5S)-2,5-Dimethylpyrrolidin-1-yl)methylene)-2,5-dimethylpyrrolidin-1-ium tetrafluoroborate" [P]. US Patent, US 9230023 B2, 2021-11-16.
发明人林芳,刘建华,胡光. "A Process for Preparing High-Purity (2S,5S)-1-(((2S,5S)-2,5-Dimethylpyrrolidin-1-yl)methylene)-2,5-dimethylpyrrolidin-1-ium tetrafluoroborate" [P]. 中国发明专利, 专利号 CN 112680338 A, 授权公告日 2023-12-07.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2013, 1380, 6107-6132.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2016, 548, 5969-5973.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of (2S,5S)-1-(((2S,5S)-2,5-Dimethylpyrrolidin-1-yl)methylene)-2,5-dimethylpyrrolidin-1-ium tetrafluoroborate Using HRMS and NMR". Biomed. Chromatogr., 2015, 2159, (9), 2907-2910.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2021, 1745, 5050-5071.