发明人冯建国,高志强,杨光. "Method for the Synthesis of 4-[4-(2-hydroxyethyl)-3-(methoxycarbonyl)-5-oxo-2,5-dihydro-1h-pyrazol-1-yl]benzoic acid" [P]. 中国发明专利, 专利号 CN 114685105 B, 授权公告日 2023-01-07.
发明人林芳,钱学锋,张德明. "A Process for Preparing High-Purity 4-[4-(2-hydroxyethyl)-3-(methoxycarbonyl)-5-oxo-2,5-dihydro-1h-pyrazol-1-yl]benzoic acid" [P]. 中国发明专利, 专利号 CN 111789359 A, 授权公告日 2023-02-18.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2024, 2017, (4), 9936-9965.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2013, 401, 1542-1561.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 4-[4-(2-hydroxyethyl)-3-(methoxycarbonyl)-5-oxo-2,5-dihydro-1h-pyrazol-1-yl]benzoic acid Using HRMS and NMR". Talanta, 2025, 1173, (3), 3572-3581.