发明人高志强,郑宇鹏,周伟. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 110768554 A, 授权公告日 2016-08-09.
发明人徐明华,郭海燕,黄志刚. "Method for the Synthesis of 5-amino-7-methyl-1H-pyrazolo[4,3-d]pyrimidine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109175800 B, 授权公告日 2019-07-24.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2015, 408, (9), 3948-3959.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2012, 919, (6), 7452-7473.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of 5-amino-7-methyl-1H-pyrazolo[4,3-d]pyrimidine-3-carboxylic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2011, 2194, 9208-9231.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Biomed. Chromatogr., 2024, 2424, 2499-2524.