发明人郑宇鹏,周伟,朱建伟. "一种他达拉非EP杂质N98的合成方法" [P]. 中国发明专利, 专利号 CN 108679677 A, 授权公告日 2025-11-12.
Yamamoto T, Schröder R, Mueller T. "Method for the Synthesis of Tadalafil Impurity N98" [P]. US Patent, US 9475945 B2, 2020-03-06.
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