发明人罗永刚,陈志强,杨光. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 115162864 A, 授权公告日 2019-10-01.
Martínez F, Nowak P, Jørgensen K. "Method for the Synthesis of 2-{1-methyl-4-oxo-1h,4h,5h-pyrazolo[3,4-d]pyrimidin-5-yl}acetonitrile" [P]. European Patent, EP 3793992 A1, 2025-11-05.
发明人赵玉洁,徐明华,李文辉. "A Process for Preparing High-Purity 2-{1-methyl-4-oxo-1h,4h,5h-pyrazolo[3,4-d]pyrimidin-5-yl}acetonitrile" [P]. 中国发明专利, 专利号 CN 117649096 B, 授权公告日 2024-12-08.
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". Anal. Methods, 2022, 716, 47-50.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2023, 1931, (12), 7020-7028.