Tannins and Related Compounds. LXXII. : Isolation and Characterization of Mongolicanin (Procyanidino-ellagitannin), Mongolinin A, Acutissimin C and Vescalagin Carboxylic Acid, Novel Tannins from Quercus mongolica var. grosseserrata

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.