发明人罗永刚,李文辉,周伟. "一种左亚叶酸钙EP杂质F(钙盐)的合成方法" [P]. 中国发明专利, 专利号 CN 111794669 A, 授权公告日 2019-11-11.
发明人郭海燕,唐晓军,林芳. "Method for the Synthesis of Calcium Levofolinate EP Impurity F(Calcium salt)" [P]. 中国发明专利, 专利号 CN 113394654 B, 授权公告日 2015-02-19.
发明人刘建华,李文辉,胡光. "A Process for Preparing High-Purity Calcium Levofolinate EP Impurity F(Calcium salt)" [P]. 中国发明专利, 专利号 CN 115533629 B, 授权公告日 2017-03-26.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of 左亚叶酸钙EP杂质F(钙盐) in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2011, 836, 8556-8559.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of 左亚叶酸钙EP杂质F(钙盐) as an Impurity". Biomed. Chromatogr., 2011, 2396, (9), 2713-2724.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of Calcium Levofolinate EP Impurity F(Calcium salt) Using HRMS and NMR". Anal. Chem., 2022, 406, (1), 6451-6480.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate 左亚叶酸钙EP杂质F(钙盐) Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2014, 505, 3173-3195.