发明人王建平,周伟,徐明华. "Method for the Synthesis of 2-((4-Butylphenyl)amino)-9-((2-hydroxyethoxy)methyl)-1H-purin-6(9H)-one" [P]. 中国发明专利, 专利号 CN 109125748 B, 授权公告日 2022-08-17.
发明人韩伟,周伟,王建平. "A Process for Preparing High-Purity 2-((4-Butylphenyl)amino)-9-((2-hydroxyethoxy)methyl)-1H-purin-6(9H)-one" [P]. 中国发明专利, 专利号 CN 117485942 B, 授权公告日 2024-03-02.
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