发明人李文辉,黄志刚,高志强. "Method for the Synthesis of Avanafil Impurity 34" [P]. 中国发明专利, 专利号 CN 117455595 A, 授权公告日 2017-08-12.
发明人王建平,陈志强,郭海燕. "A Process for Preparing High-Purity Avanafil Impurity 34" [P]. 中国发明专利, 专利号 CN 110123171 A, 授权公告日 2023-05-12.
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