发明人徐明华,杨光,王建平. "Method for the Synthesis of 4,6-Bis(methoxycarbonyl)picolinic acid" [P]. 中国发明专利, 专利号 CN 113830487 A, 授权公告日 2016-08-28.
发明人黄志刚,马晓峰,钱学锋. "A Process for Preparing High-Purity 4,6-Bis(methoxycarbonyl)picolinic acid" [P]. 中国发明专利, 专利号 CN 113333076 B, 授权公告日 2019-02-19.
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