Chen K W, Klinger H, Roberts E F. "Method for the Synthesis of 5-Amino-1-(3-chloro-4-fluorophenyl)-1<I>H</I>-pyrazole-4-carbonitrile" [P]. US Patent, US 10996573 B2, 2023-02-12.
发明人郭海燕,徐明华,钱学锋. "A Process for Preparing High-Purity 5-Amino-1-(3-chloro-4-fluorophenyl)-1<I>H</I>-pyrazole-4-carbonitrile" [P]. 中国发明专利, 专利号 CN 113852887 A, 授权公告日 2019-07-24.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of 5-Amino-1-(3-chloro-4-fluorophenyl)-1<I>H</I>-pyrazole-4-carbonitrile in Pharmaceutical Formulations". Biomed. Chromatogr., 2022, 1980, 7428-7431.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of 5-Amino-1-(3-chloro-4-fluorophenyl)-1<I>H</I>-pyrazole-4-carbonitrile as an Impurity". Rapid Commun. Mass Spectrom., 2012, 568, (2), 1459-1471.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 5-Amino-1-(3-chloro-4-fluorophenyl)-1<I>H</I>-pyrazole-4-carbonitrile Using HRMS and NMR". Anal. Chim. Acta, 2024, 668, 7682-7692.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate 5-Amino-1-(3-chloro-4-fluorophenyl)-1<I>H</I>-pyrazole-4-carbonitrile Profile in Drug Substances According to ICH Guidelines". Talanta, 2013, 1035, (9), 666-696.