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发明人张德明,郭海燕,冯建国. "A Process for Preparing High-Purity 1-(3,4-Dimethoxyphenyl)-2-(pyridin-4-yl)ethan-1-one" [P]. 中国发明专利, 专利号 CN 115270690 A, 授权公告日 2022-11-02.
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