Davis P L, Fischer A B, Chen K W. "Method for the Synthesis of 4-Ethyl-5-propyl-1H-pyrazol-3(2H)-one" [P]. US Patent, US 10117800 B2, 2021-05-11.
Mueller T C, Martínez F, Sørensen M. "A Process for Preparing High-Purity 4-Ethyl-5-propyl-1H-pyrazol-3(2H)-one" [P]. European Patent, EP 3336265 A1, 2023-05-07.
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". Biomed. Chromatogr., 2025, 972, 2481-2497.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2017, 2097, 8420-8434.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 4-Ethyl-5-propyl-1H-pyrazol-3(2H)-one Using HRMS and NMR". Anal. Chem., 2022, 1746, 4931-4938.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2017, 1473, 937-958.