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发明人王建平,钱学锋,刘建华. "A Process for Preparing High-Purity 3-(4-Chlorophenyl)-1-(p-tolylamino)-1H-pyrrole-2,5-dione" [P]. 中国发明专利, 专利号 CN 109297909 B, 授权公告日 2019-01-11.
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