Hughes D C, Chen K W, Johnson M A. "一种的合成方法" [P]. US Patent, US 10876848 B2, 2025-04-08.
发明人胡光,高志强,陈志强. "Method for the Synthesis of 4-Hydroxypyrimido[1,2-a]benzimidazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110534129 B, 授权公告日 2020-08-26.
发明人黄志刚,刘建华,徐明华. "A Process for Preparing High-Purity 4-Hydroxypyrimido[1,2-a]benzimidazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111392583 B, 授权公告日 2016-02-22.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2023, 2185, (12), 5792-5811.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2025, 763, 972-988.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 4-Hydroxypyrimido[1,2-a]benzimidazole-3-carboxylic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2022, 1485, 5035-5061.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2016, 937, 1752-1771.