发明人郑宇鹏,周伟,罗永刚. "Method for the Synthesis of 3-Methyl-4-oxo-2-thioxo-1,2,3,4-tetrahydroquinazoline-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109994359 A, 授权公告日 2020-01-03.
发明人郑宇鹏,王建平,陈志强. "A Process for Preparing High-Purity 3-Methyl-4-oxo-2-thioxo-1,2,3,4-tetrahydroquinazoline-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109016707 A, 授权公告日 2021-04-20.
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