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发明人罗永刚,冯建国,韩伟. "A Process for Preparing High-Purity 4-[(E)-[(3,4,5-Trimethoxyphenyl)methylidene]amino]phenyl 4-methoxybenzene-1-sulfonate" [P]. 中国发明专利, 专利号 CN 111224888 A, 授权公告日 2015-08-16.
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