O'Brien P Q, Lee S K, Mueller T. "一种的合成方法" [P]. US Patent, US 10136492 B2, 2017-04-16.
发明人胡光,高志强,刘建华. "Method for the Synthesis of 1-Ethyl-3-(1,4,5,6-tetrahydropyrazin-2-yl)-1,6-dihydropyrrolo[2,3-c]pyrazole" [P]. 中国发明专利, 专利号 CN 110704161 A, 授权公告日 2019-11-14.
发明人钱学锋,冯建国,王建平. "A Process for Preparing High-Purity 1-Ethyl-3-(1,4,5,6-tetrahydropyrazin-2-yl)-1,6-dihydropyrrolo[2,3-c]pyrazole" [P]. 中国发明专利, 专利号 CN 112833374 B, 授权公告日 2015-03-04.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2011, 2013, (12), 458-477.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2020, 2340, 1997-2016.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 1-Ethyl-3-(1,4,5,6-tetrahydropyrazin-2-yl)-1,6-dihydropyrrolo[2,3-c]pyrazole Using HRMS and NMR". J. Agric. Food Chem., 2011, 691, 6991-7002.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2022, 344, 7253-7273.