发明人张德明,周伟,刘建华. "一种西格列汀杂质157的合成方法" [P]. 中国发明专利, 专利号 CN 109635781 A, 授权公告日 2021-04-12.
发明人刘建华,孙丽萍,钱学锋. "Method for the Synthesis of Sitagliptin Impurity 157" [P]. 中国发明专利, 专利号 CN 108474110 A, 授权公告日 2023-11-02.
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