Fischer A B, Park J H, Anderson J P. "一种的合成方法" [P]. US Patent, US 11285006 B2, 2024-02-11.
Davis P L, Schröder R, Roberts E F. "Method for the Synthesis of Ethyl 5-(3,4-difluorophenyl)-1H-pyrazole-3-carboxylate" [P]. US Patent, US 10010688 B2, 2019-08-06.
发明人孙丽萍,李文辉,罗永刚. "A Process for Preparing High-Purity Ethyl 5-(3,4-difluorophenyl)-1H-pyrazole-3-carboxylate" [P]. 中国发明专利, 专利号 CN 109225118 A, 授权公告日 2025-03-07.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2018, 265, (8), 5567-5579.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2019, 165, 4009-4034.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5-(3,4-difluorophenyl)-1H-pyrazole-3-carboxylate Using HRMS and NMR". Anal. Methods, 2018, 802, 178-201.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Talanta, 2013, 636, 8614-8637.