Schröder R, Thompson G K, Hughes D C. "一种的合成方法" [P]. US Patent, US 11925952 B2, 2021-05-07.
发明人高志强,赵玉洁,孙丽萍. "Method for the Synthesis of 2-Ethyl-2,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one" [P]. 中国发明专利, 专利号 CN 114882094 A, 授权公告日 2025-12-01.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2017, 1843, (5), 1542-1559.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2016, 497, 3693-3700.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 2-Ethyl-2,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one Using HRMS and NMR". Talanta, 2012, 1789, (3), 23-27.