发明人杨光,胡光,高志强. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109981445 A, 授权公告日 2017-10-25.
发明人林芳,孙丽萍,黄志刚. "Method for the Synthesis of tert-Butyl 2-formyl-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate" [P]. 中国发明专利, 专利号 CN 112979765 A, 授权公告日 2021-04-16.
发明人孙丽萍,何建平,沈红梅. "A Process for Preparing High-Purity tert-Butyl 2-formyl-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate" [P]. 中国发明专利, 专利号 CN 116108624 B, 授权公告日 2019-12-14.
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". Chemosphere, 2025, 345, (8), 145-166.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2017, 880, 8445-8473.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 2-formyl-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate Using HRMS and NMR". Anal. Methods, 2022, 233, (10), 7206-7229.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2025, 117, (9), 5046-5054.