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发明人郑宇鹏,周伟,何建平. "A Process for Preparing High-Purity Methyl 5,6-dimethoxy-1-methyl-1H-indole-2-carboxylate" [P]. 中国发明专利, 专利号 CN 111958079 A, 授权公告日 2017-09-12.
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