Abstract
A novel procyanidino-ellagitannin, mongolicanin (1), has been isolated, together with three new tannins, mongolinin A (4), acutissimin C (7) and vescalagin carboxilic acid (8), from the bark of Quercus mongolica var. grosseserrata (Fagaceae), and the structure of these compounds were established on the basis of physicochemical data.
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