Mueller T, Patel M V, Johnson M A. "Method for the Synthesis of 6-Oxo-1,6-dihydro-[2,2'-bipyrimidine]-5-carboxylic acid" [P]. US Patent, US 9038010 B2, 2023-11-24.
发明人郑宇鹏,郭海燕,孙丽萍. "A Process for Preparing High-Purity 6-Oxo-1,6-dihydro-[2,2'-bipyrimidine]-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108949872 B, 授权公告日 2022-07-03.
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