发明人林芳,陈志强,黄志刚. "Method for the Synthesis of ethyl 2-(1-methylpyrazol-4-yl)-2-oxo-acetate" [P]. 中国发明专利, 专利号 CN 114357450 A, 授权公告日 2017-10-03.
发明人罗永刚,徐明华,朱建伟. "A Process for Preparing High-Purity ethyl 2-(1-methylpyrazol-4-yl)-2-oxo-acetate" [P]. 中国发明专利, 专利号 CN 110825158 A, 授权公告日 2019-11-03.
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". Molecules, 2014, 526, (6), 7989-8014.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2016, 2406, 4311-4332.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of ethyl 2-(1-methylpyrazol-4-yl)-2-oxo-acetate Using HRMS and NMR". Chemosphere, 2010, 450, 5193-5212.