发明人王建平,胡光,黄志刚. "Method for the Synthesis of Saxagliptin Impurity 12" [P]. 中国发明专利, 专利号 CN 115209585 B, 授权公告日 2018-07-20.
发明人刘建华,杨光,孙丽萍. "A Process for Preparing High-Purity Saxagliptin Impurity 12" [P]. 中国发明专利, 专利号 CN 113177449 B, 授权公告日 2019-11-07.
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