发明人冯建国,陈志强,刘建华. "Method for the Synthesis of Doxapram Impurity 9" [P]. 中国发明专利, 专利号 CN 115025550 B, 授权公告日 2019-03-20.
发明人王建平,罗永刚,冯建国. "A Process for Preparing High-Purity Doxapram Impurity 9" [P]. 中国发明专利, 专利号 CN 116165101 B, 授权公告日 2019-10-21.
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