Johnson M A, Roberts E F, Kumar R. "Method for the Synthesis of 5H-Pyrrolo[5,4-b]pyrazine-7-carbonitrile" [P]. US Patent, US 9995355 B2, 2023-02-16.
发明人周伟,林芳,钱学锋. "A Process for Preparing High-Purity 5H-Pyrrolo[5,4-b]pyrazine-7-carbonitrile" [P]. 中国发明专利, 专利号 CN 108643936 A, 授权公告日 2017-07-01.
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". Biomed. Chromatogr., 2022, 683, (8), 4992-5013.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2018, 1894, (10), 8467-8479.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 5H-Pyrrolo[5,4-b]pyrazine-7-carbonitrile Using HRMS and NMR". Molecules, 2017, 243, (6), 1578-1606.