Nowak P, Lefèvre J P, Martínez F. "一种的合成方法" [P]. European Patent, EP 3819506 A1, 2022-09-25.
Nowak P, Rossi M, Björnsson E. "Method for the Synthesis of 3-Ethylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid" [P]. European Patent, EP 3574146 A1, 2024-12-16.
发明人胡光,郑宇鹏,韩伟. "A Process for Preparing High-Purity 3-Ethylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108846963 A, 授权公告日 2024-05-15.
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". Environ. Sci. Technol., 2017, 1544, 9017-9023.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2017, 1917, 3383-3411.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 3-Ethylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid Using HRMS and NMR". Biomed. Chromatogr., 2012, 1662, 807-827.