Chen K W, Schröder R, Williams B T. "一种的合成方法" [P]. US Patent, US 10901554 B2, 2021-08-28.
发明人何建平,郭海燕,孙丽萍. "Method for the Synthesis of {4H,5H,6H,7H-pyrazolo[1,5-a]pyrazin-2-yl}methanol" [P]. 中国发明专利, 专利号 CN 111898641 A, 授权公告日 2022-01-11.
Martínez F, Johansson L, Björnsson E. "A Process for Preparing High-Purity {4H,5H,6H,7H-pyrazolo[1,5-a]pyrazin-2-yl}methanol" [P]. European Patent, EP 3998121 A1, 2021-04-25.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2014, 244, (2), 1901-1914.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2023, 1730, 9910-9933.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of {4H,5H,6H,7H-pyrazolo[1,5-a]pyrazin-2-yl}methanol Using HRMS and NMR". Molecules, 2013, 2293, (9), 6636-6658.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2010, 2399, (8), 2211-2230.