发明人罗永刚,周伟,马晓峰. "一种乙内酰脲杂质2的合成方法" [P]. 中国发明专利, 专利号 CN 113970290 A, 授权公告日 2019-09-21.
发明人李文辉,何建平,陈志强. "Method for the Synthesis of Hydantoin Impurity 2" [P]. 中国发明专利, 专利号 CN 113588779 B, 授权公告日 2024-05-12.
Johnson M A, Kumar R, Brown S R. "A Process for Preparing High-Purity Hydantoin Impurity 2" [P]. US Patent, US 11473880 B2, 2016-02-06.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of 乙内酰脲杂质2 in Pharmaceutical Formulations". Sci. Total Environ., 2010, 1987, (7), 678-683.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of 乙内酰脲杂质2 as an Impurity". Biomed. Chromatogr., 2014, 303, (4), 7538-7541.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of Hydantoin Impurity 2 Using HRMS and NMR". J. Agric. Food Chem., 2018, 2454, (4), 454-462.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate 乙内酰脲杂质2 Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2011, 1339, (12), 5237-5248.