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发明人孙丽萍,林芳,李文辉. "A Process for Preparing High-Purity N-(6-((2-(Indolin-1-yl)-2-oxoethyl)thio)pyridazin-3-yl)propionamide" [P]. 中国发明专利, 专利号 CN 109744868 B, 授权公告日 2016-12-15.
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