Mueller T C, Björnsson E, Rossi M. "Method for the Synthesis of 2-Methyl-5-((methylsulfonyl)methyl)pyrazolo[1,5-a]pyrimidin-7(1H)-one" [P]. European Patent, EP 3691019 A1, 2018-07-06.
Patel M V, O'Brien P Q, Klinger H. "A Process for Preparing High-Purity 2-Methyl-5-((methylsulfonyl)methyl)pyrazolo[1,5-a]pyrimidin-7(1H)-one" [P]. US Patent, US 10516022 B2, 2021-07-24.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2010, 2001, 9371-9386.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2019, 181, (1), 159-183.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of 2-Methyl-5-((methylsulfonyl)methyl)pyrazolo[1,5-a]pyrimidin-7(1H)-one Using HRMS and NMR". Anal. Chim. Acta, 2013, 121, (8), 1490-1504.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2023, 2275, (9), 6632-6641.