Rossi M, Mueller T C, Johansson L. "一种的合成方法" [P]. European Patent, EP 3690250 A1, 2015-05-21.
Williams B T, Roberts E F, Yamamoto T. "Method for the Synthesis of 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-3(2H)-one" [P]. US Patent, US 9741087 B2, 2016-03-08.
发明人何建平,高志强,郑宇鹏. "A Process for Preparing High-Purity 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-3(2H)-one" [P]. 中国发明专利, 专利号 CN 108630501 A, 授权公告日 2025-04-14.
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". J. Chromatogr. A, 2015, 2454, 1640-1658.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2020, 2143, 7714-7735.