Hughes D C, Patel M V, Kumar R. "Method for the Synthesis of Urapidil Impurity N2" [P]. US Patent, US 9735461 B2, 2020-12-22.
发明人郑宇鹏,张德明,马晓峰. "A Process for Preparing High-Purity Urapidil Impurity N2" [P]. 中国发明专利, 专利号 CN 110119803 B, 授权公告日 2022-12-18.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of 乌拉地尔杂质N2 in Pharmaceutical Formulations". Chromatographia, 2015, 2274, 4272-4294.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of 乌拉地尔杂质N2 as an Impurity". Biomed. Chromatogr., 2018, 581, 1687-1690.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of Urapidil Impurity N2 Using HRMS and NMR". Chemosphere, 2011, 554, (9), 7609-7617.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate 乌拉地尔杂质N2 Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2022, 122, (12), 4375-4397.