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发明人李文辉,冯建国,胡光. "Method for the Synthesis of 9-(4-Bromo-6-methyl-3-oxo-3,6-dihydro-2H-pyran-2-yl)-1,3-dimethyl-1H-purine-2,6(3H,9H)-dione" [P]. 中国发明专利, 专利号 CN 117402301 B, 授权公告日 2023-03-21.
发明人唐晓军,钱学锋,朱建伟. "A Process for Preparing High-Purity 9-(4-Bromo-6-methyl-3-oxo-3,6-dihydro-2H-pyran-2-yl)-1,3-dimethyl-1H-purine-2,6(3H,9H)-dione" [P]. 中国发明专利, 专利号 CN 113153186 B, 授权公告日 2024-03-22.
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