发明人朱建伟,郭海燕,王建平. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 112215979 A, 授权公告日 2023-01-03.
Park J H, Stevens L M, Davis P L. "Method for the Synthesis of 9-(3,4-Dimethylphenyl)-8,9-dihydro-8-oxo-7H-purine-6-carboxamide" [P]. US Patent, US 9004938 B2, 2024-09-17.
Kowalski A, Rossi M, Mueller T C. "A Process for Preparing High-Purity 9-(3,4-Dimethylphenyl)-8,9-dihydro-8-oxo-7H-purine-6-carboxamide" [P]. European Patent, EP 3788152 A1, 2020-03-27.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2016, 1172, 306-318.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2015, 104, 2572-2594.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 9-(3,4-Dimethylphenyl)-8,9-dihydro-8-oxo-7H-purine-6-carboxamide Using HRMS and NMR". Chromatographia, 2025, 1408, (7), 3801-3819.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2017, 515, (11), 3464-3489.