发明人冯建国,周伟,郭海燕. "Method for the Synthesis of 5-(Difluoromethyl)-4-methylpicolinic acid" [P]. 中国发明专利, 专利号 CN 108227786 A, 授权公告日 2017-10-10.
发明人唐晓军,孙丽萍,杨光. "A Process for Preparing High-Purity 5-(Difluoromethyl)-4-methylpicolinic acid" [P]. 中国发明专利, 专利号 CN 111917933 A, 授权公告日 2020-11-07.
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