O'Brien P Q, Lee S K, Kumar R. "一种的合成方法" [P]. US Patent, US 9253565 B2, 2017-07-24.
Nowak P, Lefèvre J P, Jørgensen K. "Method for the Synthesis of 4-Methylpyrido[3,4-d]pyrimidine" [P]. European Patent, EP 3450743 A1, 2020-09-16.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2020, 1525, (4), 2004-2033.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2022, 2448, 9295-9310.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 4-Methylpyrido[3,4-d]pyrimidine Using HRMS and NMR". J. Agric. Food Chem., 2019, 829, (10), 9758-9778.