Published August 31, 1962
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Synthesis of 5,6,8,3',4'-Pentamethoxyflavone
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The pentamethoxyflavone (II) has been synthesised by subjecting 5-hyrdroxy-6,3',4'-trimethoxyflavone (VII) to hydroxylation with alkaline persulphate and subsequent methylation; it has been recently reported to occur in the orange peel and named sinensetin.