Since ascorbic acid is known to participate in the production of 9 from 1 in mature leaves [ 15 ], the observation of a large peak of 8 in the HPLC analysis of mature leaves ( Figure 2 ) may be significant for the elucidation of the ellagitannin biosynthesis.
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Identification of Unstable Ellagitannin Metabolites in the Leaves of <i>Quercus dentata</i> by Chemical Derivatization.
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