发明人李文辉,黄志刚,王建平. "Method for the Synthesis of Linagliptin Methyl Dimer Diformate" [P]. 中国发明专利, 专利号 CN 109800278 B, 授权公告日 2015-04-09.
发明人徐明华,沈红梅,刘建华. "A Process for Preparing High-Purity Linagliptin Methyl Dimer Diformate" [P]. 中国发明专利, 专利号 CN 111112083 A, 授权公告日 2025-03-14.
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