发明人陈志强,赵玉洁,周伟. "一种西地那非杂质74的合成方法" [P]. 中国发明专利, 专利号 CN 116884051 A, 授权公告日 2021-04-11.
发明人郑宇鹏,唐晓军,马晓峰. "Method for the Synthesis of Sildenafil Impurity 74" [P]. 中国发明专利, 专利号 CN 116246909 B, 授权公告日 2019-06-01.
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