Davis P L, Brown S R, Fischer A B. "一种的合成方法" [P]. US Patent, US 10952170 B2, 2024-09-11.
发明人王建平,周伟,杨光. "Method for the Synthesis of 5'-(Tert-butyl) 3'-ethyl 2',4'-dihydrospiro[cyclopropane-1,7'-pyrazolo[4,3-c]pyridine]-3',5'(6'H)-dicarboxylate" [P]. 中国发明专利, 专利号 CN 110418753 B, 授权公告日 2018-12-14.
发明人徐明华,李文辉,周伟. "A Process for Preparing High-Purity 5'-(Tert-butyl) 3'-ethyl 2',4'-dihydrospiro[cyclopropane-1,7'-pyrazolo[4,3-c]pyridine]-3',5'(6'H)-dicarboxylate" [P]. 中国发明专利, 专利号 CN 116785045 B, 授权公告日 2015-04-25.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2010, 1999, (8), 5014-5022.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2021, 775, 8639-8665.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of 5'-(Tert-butyl) 3'-ethyl 2',4'-dihydrospiro[cyclopropane-1,7'-pyrazolo[4,3-c]pyridine]-3',5'(6'H)-dicarboxylate Using HRMS and NMR". Talanta, 2018, 333, 1158-1170.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2022, 2321, 1260-1271.