发明人周伟,李文辉,黄志刚. "Method for the Synthesis of Methyl 1-ethyl-1H-pyrazole-5-carboxylate" [P]. 中国发明专利, 专利号 CN 115389744 A, 授权公告日 2021-09-27.
发明人唐晓军,刘建华,高志强. "A Process for Preparing High-Purity Methyl 1-ethyl-1H-pyrazole-5-carboxylate" [P]. 中国发明专利, 专利号 CN 114041480 A, 授权公告日 2024-06-15.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2015, 1517, 168-182.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2023, 1756, (10), 5635-5657.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 1-ethyl-1H-pyrazole-5-carboxylate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2020, 1458, 2570-2582.
Zhou X P, Huang L, Wu G. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2020, 1028, 9200-9221.