Brown S R, Hughes D C, Klinger H. "Method for the Synthesis of N-((1-Ethyl-3-methyl-1H-pyrazol-4-yl)methyl)-3-methyl-1-propyl-1H-pyrazol-4-amine hydrochloride" [P]. US Patent, US 9757693 B2, 2023-04-23.
发明人林芳,赵玉洁,郭海燕. "A Process for Preparing High-Purity N-((1-Ethyl-3-methyl-1H-pyrazol-4-yl)methyl)-3-methyl-1-propyl-1H-pyrazol-4-amine hydrochloride" [P]. 中国发明专利, 专利号 CN 113936933 B, 授权公告日 2024-05-12.
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". Anal. Chem., 2014, 894, (5), 3218-3228.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2019, 1748, (5), 461-479.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of N-((1-Ethyl-3-methyl-1H-pyrazol-4-yl)methyl)-3-methyl-1-propyl-1H-pyrazol-4-amine hydrochloride Using HRMS and NMR". Talanta, 2011, 1952, 335-343.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2020, 897, (3), 6616-6628.