发明人唐晓军,徐明华,刘建华. "Method for the Synthesis of Ethyl 4-formyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-3-carboxylate" [P]. 中国发明专利, 专利号 CN 115473722 B, 授权公告日 2021-03-10.
发明人周伟,林芳,陈志强. "A Process for Preparing High-Purity Ethyl 4-formyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-3-carboxylate" [P]. 中国发明专利, 专利号 CN 114100841 A, 授权公告日 2022-08-26.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2023, 1471, (3), 1612-1632.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2014, 2249, (4), 6063-6084.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 4-formyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-3-carboxylate Using HRMS and NMR". J. Pharm. Biomed. Anal., 2010, 640, (4), 132-140.
Wang L, Li J, Zhang H. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2010, 1490, 5860-5888.