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发明人徐明华,罗永刚,钱学锋. "A Process for Preparing High-Purity 2-Chloro-5-(chloromethyl)-6-(difluoromethyl)pyridin-3-ol" [P]. 中国发明专利, 专利号 CN 109222060 B, 授权公告日 2019-10-03.
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