发明人郑宇鹏,唐晓军,冯建国. "Method for the Synthesis of (S)-Ipratropium Bromide EP Impurity E Formate" [P]. 中国发明专利, 专利号 CN 116710105 A, 授权公告日 2021-03-11.
发明人徐明华,郭海燕,杨光. "A Process for Preparing High-Purity (S)-Ipratropium Bromide EP Impurity E Formate" [P]. 中国发明专利, 专利号 CN 112644638 B, 授权公告日 2023-09-03.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of (S)-异丙托溴铵EP杂质E 甲酸盐 in Pharmaceutical Formulations". J. Nat. Prod., 2020, 2467, 6617-6641.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of (S)-异丙托溴铵EP杂质E 甲酸盐 as an Impurity". J. Sep. Sci., 2016, 1520, 8794-8808.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of (S)-Ipratropium Bromide EP Impurity E Formate Using HRMS and NMR". Anal. Chim. Acta, 2012, 1223, 1564-1591.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate (S)-异丙托溴铵EP杂质E 甲酸盐 Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2015, 1776, (1), 7547-7570.