发明人杨光,郭海燕,林芳. "Method for the Synthesis of Acetylcysteine EP Impurity A" [P]. 中国发明专利, 专利号 CN 114492049 A, 授权公告日 2016-04-24.
发明人冯建国,杨光,赵玉洁. "A Process for Preparing High-Purity Acetylcysteine EP Impurity A" [P]. 中国发明专利, 专利号 CN 116811682 B, 授权公告日 2022-10-10.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of L-胱氨酸 in Pharmaceutical Formulations". Biomed. Chromatogr., 2018, 780, (6), 7762-7781.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of L-胱氨酸 as an Impurity". Chromatographia, 2013, 2278, 7895-7912.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Acetylcysteine EP Impurity A Using HRMS and NMR". J. Chromatogr. A, 2016, 1118, (7), 9032-9038.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate L-胱氨酸 Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2017, 1611, (6), 3608-3620.