Fischer A B, Thompson G K, Klinger H. "一种的合成方法" [P]. US Patent, US 10226792 B2, 2018-01-27.
Brown S R, Stevens L M, Anderson J P. "Method for the Synthesis of 8-Methyl-4-oxo-4,9a-dihydro-1H-pyrido[1,2-a]pyrimidine-3-carboxylic acid" [P]. US Patent, US 9432170 B2, 2025-01-01.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2013, 556, (2), 7154-7171.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2011, 540, (10), 8068-8088.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 8-Methyl-4-oxo-4,9a-dihydro-1H-pyrido[1,2-a]pyrimidine-3-carboxylic acid Using HRMS and NMR". Food Chem., 2010, 969, 6038-6048.