Kumar R, Mueller T, Anderson J P. "Method for the Synthesis of Ethyl 3-bromo-1-butyl-1H-pyrazole-4-carboxylate" [P]. US Patent, US 11572423 B2, 2024-07-09.
发明人钱学锋,孙丽萍,李文辉. "A Process for Preparing High-Purity Ethyl 3-bromo-1-butyl-1H-pyrazole-4-carboxylate" [P]. 中国发明专利, 专利号 CN 115809411 B, 授权公告日 2020-01-13.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2017, 582, 2734-2753.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2014, 1460, 5209-5227.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 3-bromo-1-butyl-1H-pyrazole-4-carboxylate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2020, 1665, 9771-9785.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2016, 712, (5), 3772-3781.