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发明人钱学锋,李文辉,陈志强. "Method for the Synthesis of Tert-butyl 4-chloro-2-(methylthio)-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate" [P]. 中国发明专利, 专利号 CN 110550462 B, 授权公告日 2018-06-05.
发明人杨光,黄志刚,周伟. "A Process for Preparing High-Purity Tert-butyl 4-chloro-2-(methylthio)-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate" [P]. 中国发明专利, 专利号 CN 112732644 A, 授权公告日 2021-12-12.
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