发明人赵玉洁,郑宇鹏,孙丽萍. "Method for the Synthesis of Betaxolol Impurity 7" [P]. 中国发明专利, 专利号 CN 115279834 A, 授权公告日 2019-11-10.
发明人钱学锋,李文辉,唐晓军. "A Process for Preparing High-Purity Betaxolol Impurity 7" [P]. 中国发明专利, 专利号 CN 117596422 B, 授权公告日 2022-09-22.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of 倍他洛尔杂质7 in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2011, 542, (8), 7763-7786.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of 倍他洛尔杂质7 as an Impurity". J. Agric. Food Chem., 2012, 1054, (1), 3813-3836.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of Betaxolol Impurity 7 Using HRMS and NMR". Phytochemistry, 2019, 1524, 7643-7670.