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Treatment of 1,3-diketones containing benzoyloxy group in 1% aqueous sodium hydroxide can afford directly the corresponding ring-A hydroxylated flavone. 用1%的氢氧化钠水溶液处理带有芳酰氧基的1，3-丙二酮衍生物可以直接得到A环带有羟基的黄酮化合物。