Chen K W, Hughes D C, Kumar R. "Method for the Synthesis of Isopropyl 4-(2-chlorophenyl)-1-ethyl-2-methyl-5-oxo-1,4,5,7-tetrahydrofuro[3,4-b]pyridine-3-carboxylate" [P]. US Patent, US 10290567 B2, 2020-01-19.
发明人何建平,罗永刚,孙丽萍. "A Process for Preparing High-Purity Isopropyl 4-(2-chlorophenyl)-1-ethyl-2-methyl-5-oxo-1,4,5,7-tetrahydrofuro[3,4-b]pyridine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 115460222 A, 授权公告日 2018-04-17.
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". Chemosphere, 2010, 2306, 8203-8223.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2010, 2093, (1), 3560-3588.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of Isopropyl 4-(2-chlorophenyl)-1-ethyl-2-methyl-5-oxo-1,4,5,7-tetrahydrofuro[3,4-b]pyridine-3-carboxylate Using HRMS and NMR". Phytochemistry, 2021, 146, (3), 7826-7844.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2022, 947, 1958-1963.