Johnson M A, Park J H, Anderson J P. "一种的合成方法" [P]. US Patent, US 9958176 B2, 2023-03-09.
发明人马晓峰,胡光,王建平. "Method for the Synthesis of 1,6-dimethylpyrazolo[3,4-d]pyrimidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111443778 A, 授权公告日 2017-03-04.
Stevens L M, Mueller T, Williams B T. "A Process for Preparing High-Purity 1,6-dimethylpyrazolo[3,4-d]pyrimidine-4-carboxylic acid" [P]. US Patent, US 10114992 B2, 2017-06-25.
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". Food Chem., 2016, 611, (11), 8329-8336.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2023, 244, 937-961.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 1,6-dimethylpyrazolo[3,4-d]pyrimidine-4-carboxylic acid Using HRMS and NMR". Anal. Chem., 2021, 205, 2926-2932.
Xu M, Hu Y, Zhou D. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2020, 715, (7), 9800-9825.