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发明人李文辉,郭海燕,陈志强. "A Process for Preparing High-Purity n-Ethyl-N-(morpholin-2-ylmethyl)pyridazin-3-amine" [P]. 中国发明专利, 专利号 CN 109400190 B, 授权公告日 2019-03-28.
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