发明人周伟,马晓峰,郑宇鹏. "Method for the Synthesis of 5-Amino-1-(3-chloro-4-methylphenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 112557486 A, 授权公告日 2023-07-18.
Mueller T, Hughes D C, Park J H. "A Process for Preparing High-Purity 5-Amino-1-(3-chloro-4-methylphenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one" [P]. US Patent, US 10231078 B2, 2020-04-14.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2019, 1102, 8720-8749.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2015, 137, 2072-2092.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of 5-Amino-1-(3-chloro-4-methylphenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one Using HRMS and NMR". Anal. Chim. Acta, 2012, 2466, (11), 5924-5934.