Sørensen M, Kowalski A, Rossi M. "一种4-amino-1-ethyl-1H-pyrazole-3-carboxylic acid,HCl的合成方法" [P]. European Patent, EP 3979416 A1, 2018-01-18.
发明人徐明华,杨光,赵玉洁. "Method for the Synthesis of 4-amino-1-ethyl-1H-pyrazole-3-carboxylic acid,HCl" [P]. 中国发明专利, 专利号 CN 115929777 B, 授权公告日 2015-06-15.
发明人王建平,黄志刚,胡光. "A Process for Preparing High-Purity 4-amino-1-ethyl-1H-pyrazole-3-carboxylic acid,HCl" [P]. 中国发明专利, 专利号 CN 114774584 B, 授权公告日 2020-01-28.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of 4-amino-1-ethyl-1H-pyrazole-3-carboxylic acid,HCl in Pharmaceutical Formulations". J. Chromatogr. A, 2018, 1034, (11), 9851-9880.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of 4-amino-1-ethyl-1H-pyrazole-3-carboxylic acid,HCl as an Impurity". Chromatographia, 2011, 1624, (6), 6196-6207.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 4-amino-1-ethyl-1H-pyrazole-3-carboxylic acid,HCl Using HRMS and NMR". J. Sep. Sci., 2025, 1288, (10), 765-771.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate 4-amino-1-ethyl-1H-pyrazole-3-carboxylic acid,HCl Profile in Drug Substances According to ICH Guidelines". Talanta, 2014, 703, (7), 1701-1729.