Hughes D C, Williams B T, Johnson M A. "Method for the Synthesis of Methyl 2-({[5-oxo-3-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-4-ylidene]methyl}amino)acetate" [P]. US Patent, US 11420071 B2, 2023-08-01.
发明人李文辉,林芳,赵玉洁. "A Process for Preparing High-Purity Methyl 2-({[5-oxo-3-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-4-ylidene]methyl}amino)acetate" [P]. 中国发明专利, 专利号 CN 114424968 B, 授权公告日 2021-04-24.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Phytochemistry, 2021, 2387, 9116-9146.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2016, 2411, (12), 7141-7170.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 2-({[5-oxo-3-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-4-ylidene]methyl}amino)acetate Using HRMS and NMR". Chromatographia, 2020, 174, 5102-5116.