Patel M V, Williams B T, O'Brien P Q. "一种N/A的合成方法" [P]. US Patent, US 10175529 B2, 2024-06-22.
Anderson J P, Brown S R, Lee S K. "Method for the Synthesis of 7-((1,3-Diphenyl-1H-pyrazol-4-yl)methyl)-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione" [P]. US Patent, US 11483033 B2, 2018-12-10.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Chemosphere, 2019, 1477, (8), 5133-5160.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Molecules, 2011, 1610, 439-450.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 7-((1,3-Diphenyl-1H-pyrazol-4-yl)methyl)-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione Using HRMS and NMR". Food Chem., 2025, 2434, 5470-5485.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2023, 2275, 4022-4042.