Williams B T, Brown S R, Hughes D C. "一种的合成方法" [P]. US Patent, US 11095593 B2, 2022-10-08.
Brown S R, Klinger H, Stevens L M. "Method for the Synthesis of tert-Butyl (6R)-6-methyl-4H,5H,6H,7H-pyrazolo[1,5-a]pyrazine-5-carboxylate" [P]. US Patent, US 11943153 B2, 2023-12-02.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2013, 230, 3587-3598.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2023, 2395, (10), 2375-2396.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl (6R)-6-methyl-4H,5H,6H,7H-pyrazolo[1,5-a]pyrazine-5-carboxylate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2025, 242, (1), 5287-5312.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2025, 2067, (4), 7393-7397.