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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%的氫氧化鈉水溶液処理帶有芳醯氧基的1，3-丙二酮衍生物可以直接得到A環帶有羥基的黃酮化郃物。