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发明人陈志强,钱学锋,高志强. "A Process for Preparing High-Purity 3-(N-Ethyl4-chlorobenzenesulfonamido)thiophene-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109468960 B, 授权公告日 2019-02-12.
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