发明人冯建国,唐晓军,林芳. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109212713 A, 授权公告日 2024-05-16.
发明人沈红梅,周伟,王建平. "Method for the Synthesis of 4-({[4-(trifluoromethoxy)phenyl]amino}methylidene)-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 109742157 B, 授权公告日 2024-04-18.
发明人何建平,林芳,周伟. "A Process for Preparing High-Purity 4-({[4-(trifluoromethoxy)phenyl]amino}methylidene)-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 115081682 A, 授权公告日 2020-07-13.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2014, 978, 6537-6557.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2015, 1811, (6), 2998-3023.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 4-({[4-(trifluoromethoxy)phenyl]amino}methylidene)-4,5-dihydro-1H-pyrazol-5-one Using HRMS and NMR". Anal. Chim. Acta, 2018, 175, (10), 5773-5794.