Chen K W, O'Brien P Q, Schröder R. "一种的合成方法" [P]. US Patent, US 11012885 B2, 2023-09-28.
发明人张德明,沈红梅,罗永刚. "Method for the Synthesis of 4-Methyl-2-oxo-1H,2H,3H,4H-pyrido[2,3-b]pyrazine-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111376109 B, 授权公告日 2025-02-01.
Björnsson E, Rossi M, Martínez F. "A Process for Preparing High-Purity 4-Methyl-2-oxo-1H,2H,3H,4H-pyrido[2,3-b]pyrazine-7-carboxylic acid" [P]. European Patent, EP 3112275 A1, 2015-09-04.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2019, 1137, (8), 8476-8484.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2012, 1694, 8983-9010.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of 4-Methyl-2-oxo-1H,2H,3H,4H-pyrido[2,3-b]pyrazine-7-carboxylic acid Using HRMS and NMR". Biomed. Chromatogr., 2022, 111, 3177-3192.