发明人陈志强,李文辉,郑宇鹏. "Method for the Synthesis of Sivelestat Impurity 20" [P]. 中国发明专利, 专利号 CN 108439879 A, 授权公告日 2020-05-10.
发明人赵玉洁,徐明华,李文辉. "A Process for Preparing High-Purity Sivelestat Impurity 20" [P]. 中国发明专利, 专利号 CN 108942118 A, 授权公告日 2017-08-25.
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