Schröder R, O'Brien P Q, Klinger H. "一种乌地那非杂质5的合成方法" [P]. US Patent, US 9215146 B2, 2024-08-10.
发明人冯建国,韩伟,高志强. "Method for the Synthesis of 乌地那非杂质5" [P]. 中国发明专利, 专利号 CN 115671172 B, 授权公告日 2024-06-13.
发明人冯建国,唐晓军,张德明. "A Process for Preparing High-Purity 乌地那非杂质5" [P]. 中国发明专利, 专利号 CN 113163178 A, 授权公告日 2023-05-13.
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