Patel M V, Klinger H, Stevens L M. "Method for the Synthesis of 1-Isopropyl-5-propoxy-1H-pyrazole-4-carboxylic acid" [P]. US Patent, US 9249909 B2, 2023-06-15.
发明人李文辉,周伟,孙丽萍. "A Process for Preparing High-Purity 1-Isopropyl-5-propoxy-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108224170 B, 授权公告日 2021-02-10.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2016, 238, 6298-6320.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2011, 466, 2305-2325.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 1-Isopropyl-5-propoxy-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". Anal. Chim. Acta, 2018, 280, 6950-6974.