发明人李文辉,张德明,何建平. "Method for the Synthesis of 2-(1-(2-Hydroxyethyl)-4-oxo-1,4-dihydro-5H-pyrazolo[3,4-d]pyrimidin-5-yl)-N-isopropylacetamide" [P]. 中国发明专利, 专利号 CN 113574275 B, 授权公告日 2024-02-16.
Brown S R, Schröder R, Kumar R. "A Process for Preparing High-Purity 2-(1-(2-Hydroxyethyl)-4-oxo-1,4-dihydro-5H-pyrazolo[3,4-d]pyrimidin-5-yl)-N-isopropylacetamide" [P]. US Patent, US 11342274 B2, 2024-03-03.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2010, 2188, (4), 9495-9499.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2017, 990, (12), 4744-4772.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 2-(1-(2-Hydroxyethyl)-4-oxo-1,4-dihydro-5H-pyrazolo[3,4-d]pyrimidin-5-yl)-N-isopropylacetamide Using HRMS and NMR". Anal. Chim. Acta, 2012, 458, (10), 8495-8516.