Nowak P, Rossi M, Schröder R. "一种的合成方法" [P]. European Patent, EP 3315209 A1, 2019-02-06.
O'Brien P Q, Brown S R, Yamamoto T. "Method for the Synthesis of Ethyl 5-ethyl-1,4-dimethyl-1H-pyrazole-3-carboxylate" [P]. US Patent, US 11797791 B2, 2016-08-24.
O'Brien P Q, Brown S R, Lee S K. "A Process for Preparing High-Purity Ethyl 5-ethyl-1,4-dimethyl-1H-pyrazole-3-carboxylate" [P]. US Patent, US 10211527 B2, 2023-05-14.
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". Chromatographia, 2011, 241, (7), 5914-5922.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2024, 1804, (7), 3124-3132.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5-ethyl-1,4-dimethyl-1H-pyrazole-3-carboxylate Using HRMS and NMR". Food Chem., 2012, 544, (9), 150-163.