Martínez F, Kowalski A, Nowak P. "一种的合成方法" [P]. European Patent, EP 3683915 A1, 2016-01-25.
Hughes D C, Chen K W, Kumar R. "Method for the Synthesis of 1H-Pyrazolo[4,3-d]pyrimidine, 3-bromo-1-ethyl-" [P]. US Patent, US 9731464 B2, 2020-11-11.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2011, 1595, 7991-8014.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2019, 1771, 7945-7973.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 1H-Pyrazolo[4,3-d]pyrimidine, 3-bromo-1-ethyl- Using HRMS and NMR". J. Pharm. Biomed. Anal., 2021, 852, (10), 7866-7893.