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发明人郭海燕,林芳,杨光. "A Process for Preparing High-Purity 2-(Difluoromethyl)-3-hydroxy-5-iodopyridine-4-acetonitrile" [P]. 中国发明专利, 专利号 CN 115928840 A, 授权公告日 2022-04-03.
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