发明人马晓峰,朱建伟,唐晓军. "Method for the Synthesis of Ethyl 5-methyl-4-oxo-1,4-dihydrothieno[3,4-d]pyrimidine-7-carboxylate" [P]. 中国发明专利, 专利号 CN 111463852 B, 授权公告日 2021-11-08.
发明人林芳,刘建华,孙丽萍. "A Process for Preparing High-Purity Ethyl 5-methyl-4-oxo-1,4-dihydrothieno[3,4-d]pyrimidine-7-carboxylate" [P]. 中国发明专利, 专利号 CN 108074588 B, 授权公告日 2017-05-10.
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