Rossi M, Lefèvre J P, Martínez F. "一种Ephedrine Impurity18的合成方法" [P]. European Patent, EP 3547728 A1, 2019-05-18.
发明人郭海燕,刘建华,周伟. "Method for the Synthesis of Ephedrine Impurity 18" [P]. 中国发明专利, 专利号 CN 116427215 A, 授权公告日 2019-04-08.
发明人冯建国,罗永刚,郭海燕. "A Process for Preparing High-Purity Ephedrine Impurity 18" [P]. 中国发明专利, 专利号 CN 110901647 B, 授权公告日 2017-03-04.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of Ephedrine Impurity18 in Pharmaceutical Formulations". J. Sep. Sci., 2012, 2255, 3359-3386.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of Ephedrine Impurity18 as an Impurity". Anal. Chem., 2022, 1320, (12), 2108-2122.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of Ephedrine Impurity 18 Using HRMS and NMR". J. Agric. Food Chem., 2020, 1185, (7), 9296-9314.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Ephedrine Impurity18 Profile in Drug Substances According to ICH Guidelines". Molecules, 2024, 2429, (7), 4311-4336.