发明人孙丽萍,韩伟,黄志刚. "Method for the Synthesis of 4-(3-Cyano-pyrazin-2-yl)-benzoic acid ethyl ester" [P]. 中国发明专利, 专利号 CN 117024156 A, 授权公告日 2018-10-28.
发明人杨光,高志强,朱建伟. "A Process for Preparing High-Purity 4-(3-Cyano-pyrazin-2-yl)-benzoic acid ethyl ester" [P]. 中国发明专利, 专利号 CN 108967564 B, 授权公告日 2024-09-21.
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