发明人孙丽萍,胡光,张德明. "Method for the Synthesis of 3-(1-ethyl-1H-pyrazol-4-yl)-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108733650 B, 授权公告日 2024-11-23.
发明人韩伟,冯建国,陈志强. "A Process for Preparing High-Purity 3-(1-ethyl-1H-pyrazol-4-yl)-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112536843 B, 授权公告日 2023-01-15.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of 3-(1-ethyl-1H-pyrazol-4-yl)-1H-pyrazole-4-carboxylic acid in Pharmaceutical Formulations". J. Sep. Sci., 2018, 945, (10), 63-72.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of 3-(1-ethyl-1H-pyrazol-4-yl)-1H-pyrazole-4-carboxylic acid as an Impurity". Molecules, 2023, 904, 4488-4508.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 3-(1-ethyl-1H-pyrazol-4-yl)-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". Anal. Methods, 2023, 769, 2334-2353.