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Updated: Feb 1, 2026

Detection of Histone Modifications in Plant Leaves
Published on: September 23, 2011
A New Lignan from the Leaves of Zanthoxylum armatum
Abstract:
A new furofuran lignan, zanthonin (1) together with 13 known compounds including seven furofuran lignans (2-8), one isobutyl amide (9), a furanocoumarin (10) and four flavonoids (11-14) have been isolated from the leaves of Zanthoxylum armatum. The chemical structures of these compounds were elucidated mainly on the basis of NMR (ID and 2D) and MS data. This is the first report on the isolation of methylxanthoxylol (4) from Z. armatum.
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Leaving Groups
In general, in a nucleophilic substitution reaction, a nucleophile displaces a functional group, called the leaving group, from the substrate to give a substituted product. A leaving group departs the substrate molecule through heterolytic cleavage, taking the pair of electrons with it to become a relatively stable weak base in the form of an anion or a neutral molecule.
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