发明人徐明华,林芳,韩伟. "Method for the Synthesis of 4-Cyclopropoxy-3-(methylthio)picolinic acid" [P]. 中国发明专利, 专利号 CN 112694656 B, 授权公告日 2017-01-25.
发明人钱学锋,刘建华,罗永刚. "A Process for Preparing High-Purity 4-Cyclopropoxy-3-(methylthio)picolinic acid" [P]. 中国发明专利, 专利号 CN 114525687 B, 授权公告日 2016-05-13.
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