发明人郭海燕,冯建国,朱建伟. "Method for the Synthesis of Tadalafil Impurity 76" [P]. 中国发明专利, 专利号 CN 117081405 B, 授权公告日 2019-03-17.
发明人林芳,李文辉,徐明华. "A Process for Preparing High-Purity Tadalafil Impurity 76" [P]. 中国发明专利, 专利号 CN 116717415 A, 授权公告日 2022-12-20.
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