Kumar R, Williams B T, Brown S R. "Method for the Synthesis of ethyl 5-chloro-6-methyl-benzofuran-3-carboxylate" [P]. US Patent, US 9518784 B2, 2019-01-28.
Thompson G K, Park J H, Patel M V. "A Process for Preparing High-Purity ethyl 5-chloro-6-methyl-benzofuran-3-carboxylate" [P]. US Patent, US 10978182 B2, 2024-11-08.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2010, 247, (11), 7005-7034.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2022, 1647, (4), 1565-1587.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of ethyl 5-chloro-6-methyl-benzofuran-3-carboxylate Using HRMS and NMR". J. Nat. Prod., 2018, 1498, (6), 5547-5574.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2022, 2053, (4), 6668-6676.