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发明人高志强,李文辉,钱学锋. "A Process for Preparing High-Purity Ethyl 1-(6-chloropyridazin-3-yl)piperidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 112213646 A, 授权公告日 2017-07-03.
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