Fischer A B, Lee S K, Johnson M A. "Method for the Synthesis of Ethyl 4-formyl-1H-pyrazole-5-carboxylate" [P]. US Patent, US 10882089 B2, 2025-05-21.
发明人郑宇鹏,张德明,高志强. "A Process for Preparing High-Purity Ethyl 4-formyl-1H-pyrazole-5-carboxylate" [P]. 中国发明专利, 专利号 CN 112717138 A, 授权公告日 2016-07-02.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2015, 246, 6753-6760.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2016, 1544, (9), 9754-9761.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 4-formyl-1H-pyrazole-5-carboxylate Using HRMS and NMR". Food Chem., 2011, 1222, 6377-6407.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2023, 2095, 8372-8401.