Johnson M A, Patel M V, Kumar R. "一种的合成方法" [P]. US Patent, US 11048250 B2, 2023-08-07.
Roberts E F, Hughes D C, Schröder R. "Method for the Synthesis of Ethyl 5-(1-methyl-1h-pyrazol-5-yl)-1,3-oxazole-4-carboxylate" [P]. US Patent, US 11219937 B2, 2016-11-14.
Brown S R, Davis P L, Roberts E F. "A Process for Preparing High-Purity Ethyl 5-(1-methyl-1h-pyrazol-5-yl)-1,3-oxazole-4-carboxylate" [P]. US Patent, US 11379200 B2, 2024-03-07.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2010, 1791, (7), 4326-4344.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2011, 1817, (6), 5589-5611.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5-(1-methyl-1h-pyrazol-5-yl)-1,3-oxazole-4-carboxylate Using HRMS and NMR". Chemosphere, 2012, 393, 9644-9668.