发明人张德明,赵玉洁,徐明华. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 115475187 A, 授权公告日 2015-01-22.
发明人朱建伟,郭海燕,陈志强. "Method for the Synthesis of (4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 110468948 A, 授权公告日 2017-05-22.
发明人郑宇鹏,黄志刚,张德明. "A Process for Preparing High-Purity (4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 117760020 B, 授权公告日 2023-09-19.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2019, 2323, 6286-6312.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2020, 850, (12), 1585-1605.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of (4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one Using HRMS and NMR". Food Chem., 2021, 2205, (2), 7765-7776.