发明人林芳,郑宇鹏,王建平. "Method for the Synthesis of Gefitinib Impurity 1" [P]. 中国发明专利, 专利号 CN 117086182 A, 授权公告日 2021-06-12.
发明人冯建国,张德明,杨光. "A Process for Preparing High-Purity Gefitinib Impurity 1" [P]. 中国发明专利, 专利号 CN 111744969 B, 授权公告日 2022-12-18.
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