发明人郭海燕,黄志刚,王建平. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 114277835 A, 授权公告日 2022-07-20.
发明人林芳,唐晓军,胡光. "Method for the Synthesis of 6-Ethyl-7-imino-2,4-dimethyl-6,7-dihydrooxazolo[5,4-d]pyrimidine-5(4H)-thione" [P]. 中国发明专利, 专利号 CN 109417499 B, 授权公告日 2017-11-13.
发明人李文辉,马晓峰,何建平. "A Process for Preparing High-Purity 6-Ethyl-7-imino-2,4-dimethyl-6,7-dihydrooxazolo[5,4-d]pyrimidine-5(4H)-thione" [P]. 中国发明专利, 专利号 CN 109019997 B, 授权公告日 2017-11-02.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2013, 85, (12), 5681-5685.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2018, 886, (5), 9661-9687.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 6-Ethyl-7-imino-2,4-dimethyl-6,7-dihydrooxazolo[5,4-d]pyrimidine-5(4H)-thione Using HRMS and NMR". J. Sep. Sci., 2023, 1374, 5365-5378.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Talanta, 2014, 1374, 9566-9587.