发明人何建平,朱建伟,钱学锋. "Method for the Synthesis of Tert-butyl 2-amino-6-methyl-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate" [P]. 中国发明专利, 专利号 CN 110399879 A, 授权公告日 2016-04-16.
发明人罗永刚,朱建伟,林芳. "A Process for Preparing High-Purity Tert-butyl 2-amino-6-methyl-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate" [P]. 中国发明专利, 专利号 CN 114784050 A, 授权公告日 2016-07-11.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2019, 801, 4138-4165.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2011, 239, (6), 584-593.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of Tert-butyl 2-amino-6-methyl-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate Using HRMS and NMR". Anal. Chem., 2021, 123, 1951-1967.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2023, 966, (4), 8643-8672.