发明人罗永刚,马晓峰,赵玉洁. "Method for the Synthesis of Methyl 2-(ethylamino)-4-(3-methyl-1h-pyrazol-1-yl)butanoate" [P]. 中国发明专利, 专利号 CN 116476550 A, 授权公告日 2025-07-02.
发明人李文辉,孙丽萍,徐明华. "A Process for Preparing High-Purity Methyl 2-(ethylamino)-4-(3-methyl-1h-pyrazol-1-yl)butanoate" [P]. 中国发明专利, 专利号 CN 112361721 B, 授权公告日 2020-10-25.
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". Environ. Sci. Technol., 2013, 648, 5457-5484.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2019, 1468, (4), 6416-6441.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 2-(ethylamino)-4-(3-methyl-1h-pyrazol-1-yl)butanoate Using HRMS and NMR". Anal. Chim. Acta, 2020, 1819, 6255-6277.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2015, 2007, (3), 4641-4662.