Johnson M A, Williams B T, Brown S R. "一种的合成方法" [P]. US Patent, US 9820437 B2, 2025-03-02.
Yamamoto T, Thompson G K, Fischer A B. "Method for the Synthesis of 5-Butyl-4-fluoro-1H-pyrazol-3(2H)-one" [P]. US Patent, US 9697236 B2, 2016-12-06.
Fischer A B, Patel M V, Park J H. "A Process for Preparing High-Purity 5-Butyl-4-fluoro-1H-pyrazol-3(2H)-one" [P]. US Patent, US 11017441 B2, 2016-06-07.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Phytochemistry, 2015, 566, 8358-8362.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2025, 1322, (2), 8303-8323.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 5-Butyl-4-fluoro-1H-pyrazol-3(2H)-one Using HRMS and NMR". Anal. Chim. Acta, 2015, 164, (5), 4538-4554.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2011, 1233, (3), 4928-4943.