发明人王建平,胡光,钱学锋. "Method for the Synthesis of 7-Ethoxythieno[2,3-b]pyrazine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111972815 B, 授权公告日 2016-03-18.
发明人郑宇鹏,胡光,张德明. "A Process for Preparing High-Purity 7-Ethoxythieno[2,3-b]pyrazine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109686345 A, 授权公告日 2017-08-04.
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