发明人陈志强,朱建伟,高志强. "Method for the Synthesis of 1H-pyrimido[4,5-d]pyrimidine-2,4-dione" [P]. 中国发明专利, 专利号 CN 114532561 B, 授权公告日 2016-10-10.
发明人韩伟,杨光,徐明华. "A Process for Preparing High-Purity 1H-pyrimido[4,5-d]pyrimidine-2,4-dione" [P]. 中国发明专利, 专利号 CN 110894508 A, 授权公告日 2015-11-08.
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