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1.Ethyl phenylacrylate intermediate bringing a double bond was introduced first,which is subsequently transformed into triketone and then DCM was obtained with high purity.

1.采用具有骨架的β-苯基丙酸酯为中体先引入双键,再经过三酮备乙基吡喃。

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ACD, ACDA, ACDS, ACDSee, ace, acebrochol, acebutolol, acecarbromal, aceclidine, acecoline,

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3G, 401(K), a,

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