发明人孙丽萍,李文辉,韩伟. "Method for the Synthesis of Urapidil Impurity 1" [P]. 中国发明专利, 专利号 CN 114127204 A, 授权公告日 2025-05-18.
发明人黄志刚,马晓峰,陈志强. "A Process for Preparing High-Purity Urapidil Impurity 1" [P]. 中国发明专利, 专利号 CN 113441359 B, 授权公告日 2018-06-24.
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