Chen K W, Williams B T, Yamamoto T. "一种的合成方法" [P]. US Patent, US 9409844 B2, 2021-01-25.
发明人冯建国,孙丽萍,徐明华. "Method for the Synthesis of 3-Ethyl-4-(thiophen-2-yl)-1h-pyrazol-5-amine" [P]. 中国发明专利, 专利号 CN 111777233 A, 授权公告日 2020-09-27.
发明人孙丽萍,胡光,冯建国. "A Process for Preparing High-Purity 3-Ethyl-4-(thiophen-2-yl)-1h-pyrazol-5-amine" [P]. 中国发明专利, 专利号 CN 117229281 B, 授权公告日 2021-08-13.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2015, 1522, 7470-7483.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2014, 1886, 7229-7257.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 3-Ethyl-4-(thiophen-2-yl)-1h-pyrazol-5-amine Using HRMS and NMR". Anal. Chim. Acta, 2010, 106, (1), 7878-7891.
O'Brien K, Kennedy M L. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2016, 1835, (11), 4577-4598.