发明人杨光,朱建伟,王建平. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 112211812 A, 授权公告日 2019-10-21.
发明人韩伟,徐明华,郑宇鹏. "Method for the Synthesis of tert-Butyl 2,4-dihydroxy-5H,6H,7H,8H-pyrido[4,3-d]pyrimidine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 113922698 A, 授权公告日 2022-09-24.
发明人张德明,刘建华,高志强. "A Process for Preparing High-Purity tert-Butyl 2,4-dihydroxy-5H,6H,7H,8H-pyrido[4,3-d]pyrimidine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 112033320 A, 授权公告日 2022-03-22.
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". Food Chem., 2016, 301, 4712-4730.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2023, 2182, 1878-1883.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 2,4-dihydroxy-5H,6H,7H,8H-pyrido[4,3-d]pyrimidine-6-carboxylate Using HRMS and NMR". Talanta, 2013, 330, (1), 1722-1746.
Hughes D, Roberts J, Thomas A. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2019, 1782, (12), 2672-2686.