发明人张德明,赵玉洁,黄志刚. "一种西地那非杂质C2的合成方法" [P]. 中国发明专利, 专利号 CN 117176304 A, 授权公告日 2023-07-03.
发明人唐晓军,沈红梅,胡光. "Method for the Synthesis of 西地那非杂质C2" [P]. 中国发明专利, 专利号 CN 113578514 A, 授权公告日 2022-07-26.
发明人钱学锋,郭海燕,何建平. "A Process for Preparing High-Purity 西地那非杂质C2" [P]. 中国发明专利, 专利号 CN 114232127 A, 授权公告日 2015-09-26.
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