发明人杨光,徐明华,高志强. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 117454748 A, 授权公告日 2019-08-01.
Brown S R, Lee S K, Klinger H. "Method for the Synthesis of 2-(4-Methoxybenzyl)-2,4-dihydro-5H-pyrazolo[4,3-d]pyrimidine-5,7(6H)-dione" [P]. US Patent, US 9295990 B2, 2020-04-05.
Mueller T C, Nielsen H, Martínez F. "A Process for Preparing High-Purity 2-(4-Methoxybenzyl)-2,4-dihydro-5H-pyrazolo[4,3-d]pyrimidine-5,7(6H)-dione" [P]. European Patent, EP 3688726 A1, 2015-05-11.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2012, 2212, 3348-3375.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2018, 1269, (11), 3306-3331.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 2-(4-Methoxybenzyl)-2,4-dihydro-5H-pyrazolo[4,3-d]pyrimidine-5,7(6H)-dione Using HRMS and NMR". J. Agric. Food Chem., 2024, 1475, (6), 6468-6478.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Food Chem., 2011, 804, 9788-9807.