发明人孙丽萍,郑宇鹏,高志强. "Method for the Synthesis of 7-Benzyl-3-methyl-1H-purine-2,6(3H,7H)-dione" [P]. 中国发明专利, 专利号 CN 109035956 A, 授权公告日 2019-07-14.
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