发明人何建平,钱学锋,马晓峰. "Method for the Synthesis of 1-(4-Nitrophenyl)-1h,4h,5h-pyrazolo[3,4-d]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 115153608 B, 授权公告日 2025-01-08.
Lefèvre J P, Jørgensen K, Sørensen M. "A Process for Preparing High-Purity 1-(4-Nitrophenyl)-1h,4h,5h-pyrazolo[3,4-d]pyrimidin-4-one" [P]. European Patent, EP 3062769 A1, 2023-09-24.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2012, 972, 4394-4405.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2012, 1831, (1), 2993-3017.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 1-(4-Nitrophenyl)-1h,4h,5h-pyrazolo[3,4-d]pyrimidin-4-one Using HRMS and NMR". Food Chem., 2023, 2451, (9), 7486-7496.
Wang L, Li J, Zhang H. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2015, 2080, 77-105.