Abstract
Gallic acid, methyl gallate, dehydrodigallic acid, three tannic constituents named MP-2, MP-3, MP-4 and a related substance MP-10 were isolated from chestnut galls by solvent fractionation and column chromatography. Hydrolysis with tannase revealed the components of these tannic substances as follows, MP-2: D-glucose, gallic acid and compound I (3, 4, 5-trihydroxybenzyl alcohol); MP-3 and MP-4: D-glucose, compound I and compound II (dehydrodigallic acid); MP-10: D-glucose and compound I.
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