发明人李文辉,钱学锋,赵玉洁. "Method for the Synthesis of Ethyl 7-(difluoromethyl)-5-(4-methoxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 110053730 B, 授权公告日 2019-11-01.
Schröder R, Yamamoto T, Johnson M A. "A Process for Preparing High-Purity Ethyl 7-(difluoromethyl)-5-(4-methoxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. US Patent, US 11919428 B2, 2016-01-11.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2024, 2384, 6907-6915.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2021, 1755, (4), 9787-9817.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 7-(difluoromethyl)-5-(4-methoxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate Using HRMS and NMR". Molecules, 2021, 222, (8), 8343-8360.