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发明人孙丽萍,马晓峰,王建平. "Method for the Synthesis of 1-Methyl-7-phenyl-1H-pyrimido[4,5-d][1,3]oxazine-2,4-dione" [P]. 中国发明专利, 专利号 CN 109285073 B, 授权公告日 2022-01-21.
发明人李文辉,郑宇鹏,何建平. "A Process for Preparing High-Purity 1-Methyl-7-phenyl-1H-pyrimido[4,5-d][1,3]oxazine-2,4-dione" [P]. 中国发明专利, 专利号 CN 112840214 B, 授权公告日 2025-02-13.
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