Schröder R, Mueller T C, Björnsson E. "一种的合成方法" [P]. European Patent, EP 3267050 A1, 2020-03-09.
Hughes D C, Chen K W, Anderson J P. "Method for the Synthesis of Ethyl 1-hydroxy-1H-pyrazole-3-carboxylate" [P]. US Patent, US 11580771 B2, 2021-01-14.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2015, 1812, (10), 8035-8050.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2016, 2106, 6003-6025.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 1-hydroxy-1H-pyrazole-3-carboxylate Using HRMS and NMR". Environ. Sci. Technol., 2016, 1349, (7), 7106-7119.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2020, 469, (4), 5193-5220.