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发明人张德明,唐晓军,林芳. "Method for the Synthesis of 5-Chloro-6-[(3,4-difluorophenyl)amino]pyridine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112168216 A, 授权公告日 2019-06-18.
发明人陈志强,罗永刚,胡光. "A Process for Preparing High-Purity 5-Chloro-6-[(3,4-difluorophenyl)amino]pyridine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111799331 B, 授权公告日 2022-11-08.
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