Schröder R, Jørgensen K, Mueller T C. "Method for the Synthesis of 5-(2,4-Dimethoxyphenyl)-1h-pyrazole-4-carboxylic acid" [P]. European Patent, EP 3838845 A1, 2025-09-20.
发明人林芳,李文辉,韩伟. "A Process for Preparing High-Purity 5-(2,4-Dimethoxyphenyl)-1h-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108725988 B, 授权公告日 2025-06-05.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2015, 1702, (4), 8984-8987.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2020, 295, (3), 3176-3200.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of 5-(2,4-Dimethoxyphenyl)-1h-pyrazole-4-carboxylic acid Using HRMS and NMR". J. Nat. Prod., 2021, 1711, 6692-6719.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2016, 768, 1293-1310.