发明人刘建华,杨光,黄志刚. "Method for the Synthesis of 2-(2,3-Dioxo-4-(o-tolyl)-3,4-dihydropyrazin-1(2H)-yl)acetonitrile" [P]. 中国发明专利, 专利号 CN 108609317 B, 授权公告日 2022-09-03.
发明人何建平,王建平,林芳. "A Process for Preparing High-Purity 2-(2,3-Dioxo-4-(o-tolyl)-3,4-dihydropyrazin-1(2H)-yl)acetonitrile" [P]. 中国发明专利, 专利号 CN 110774796 B, 授权公告日 2022-02-12.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2010, 482, (10), 7527-7536.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2022, 1864, 6739-6755.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of 2-(2,3-Dioxo-4-(o-tolyl)-3,4-dihydropyrazin-1(2H)-yl)acetonitrile Using HRMS and NMR". Biomed. Chromatogr., 2025, 2352, (7), 2613-2616.