发明人徐明华,王建平,郑宇鹏. "Method for the Synthesis of 4-Oxo-1,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110282895 A, 授权公告日 2017-08-10.
Fischer A B, Klinger H, Stevens L M. "A Process for Preparing High-Purity 4-Oxo-1,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid" [P]. US Patent, US 9907577 B2, 2019-07-14.
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