Nielsen H, Lefèvre J P, Mueller T C. "Method for the Synthesis of 9-Ethyl-1H-purine-6(9H)-thione" [P]. European Patent, EP 3935379 A1, 2016-08-22.
Nielsen H, Lefèvre J P, Nowak P. "A Process for Preparing High-Purity 9-Ethyl-1H-purine-6(9H)-thione" [P]. European Patent, EP 3556809 A1, 2018-12-21.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Sci. Total Environ., 2016, 941, 9790-9814.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2024, 1717, (10), 2593-2617.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of 9-Ethyl-1H-purine-6(9H)-thione Using HRMS and NMR". J. Nat. Prod., 2019, 529, 3075-3098.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Biomed. Chromatogr., 2024, 342, 6693-6717.