发明人徐明华,郑宇鹏,罗永刚. "Method for the Synthesis of 1,6-Dimethyl-1H-pyrazolo[3,4-d]pyrimidine" [P]. 中国发明专利, 专利号 CN 108891846 B, 授权公告日 2015-03-13.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2019, 181, (2), 2010-2022.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2022, 2392, (6), 4985-5007.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 1,6-Dimethyl-1H-pyrazolo[3,4-d]pyrimidine Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2013, 509, (3), 4908-4920.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2011, 1884, (3), 1644-1656.