Schröder R, Mueller T C, Martínez F. "一种1,3-dimethyl-5-(4-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carboxylic acid的合成方法" [P]. European Patent, EP 3971635 A1, 2018-03-01.
Kowalski A, Björnsson E, Nielsen H. "Method for the Synthesis of 1,3-dimethyl-5-(4-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carboxylic acid" [P]. European Patent, EP 3922831 A1, 2017-03-13.
Hughes D C, O'Brien P Q, Fischer A B. "A Process for Preparing High-Purity 1,3-dimethyl-5-(4-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carboxylic acid" [P]. US Patent, US 9728965 B2, 2019-02-01.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of 1,3-dimethyl-5-(4-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carboxylic acid in Pharmaceutical Formulations". Biomed. Chromatogr., 2024, 963, 1876-1882.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of 1,3-dimethyl-5-(4-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carboxylic acid as an Impurity". Phytochemistry, 2023, 2014, (10), 6339-6346.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 1,3-dimethyl-5-(4-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". Environ. Sci. Technol., 2015, 999, (1), 7579-7594.