Klinger H, Johnson M A, Davis P L. "Method for the Synthesis of 4-cyclopropyl-1-methyl-1H-pyrazole-5-carboxylic acid" [P]. US Patent, US 10184219 B2, 2024-12-19.
发明人张德明,马晓峰,韩伟. "A Process for Preparing High-Purity 4-cyclopropyl-1-methyl-1H-pyrazole-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115348246 A, 授权公告日 2019-11-09.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of 4-cyclopropyl-1-methyl-1H-pyrazole-5-carboxylic acid in Pharmaceutical Formulations". Molecules, 2017, 2345, 2542-2570.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of 4-cyclopropyl-1-methyl-1H-pyrazole-5-carboxylic acid as an Impurity". J. Sep. Sci., 2025, 1689, 9350-9367.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 4-cyclopropyl-1-methyl-1H-pyrazole-5-carboxylic acid Using HRMS and NMR". Phytochemistry, 2011, 612, (3), 3680-3709.