Hydrolysable tannins of Eucalyptus delegatensis wood

Novel Lipid‐Peroxidation‐ and Cyclooxygenase‐Inhibitory Tannins from Picrorhiza kurroa Seeds

“…The coupling constants of the sugar H-atoms were similar to those reported for isocorilagin [17]. Since J 1,2 (4.0 Hz) for HÀC (1) is larger for a-than for b-configured 1 C 4 -type tannins, the glucopyranose ring in 2 was assumed to adopt a skewed-boat geometry [18] [19].…”

Identification of hydrolysable tannins in the reaction zone of Eucalyptus nitens wood by high performance liquid chromatography–electrospray ionisation mass spectrometry

“…Approximately 20 ellagitannins have been reported from the heartwood of Eucalyptus species (e.g. Seikel and Hillis, 1970;Hillis and Yazaki, 1973;Hart and Hillis, 1974;Yazaki et al, 1993). Other studies have noted the presence of numerous ellagitannins in eucalypt branch wood but have not identified individual compounds (Conde et al, 1995;Cadahia et al, 1997).…”

Detection of Northern Red Oak Wetwood by Fast Heating and Ion Mobility Spectrometric Analysis

“…These two compounds were positively identified by comparison with authentic compounds (Table 3) (7) 112 (7), 239(100), 240(18), 241 (7), 254(83), 255 (17), 256 (7) 112 (12), 239(100), 240(15), 241 (7), 254(78), 255 (13) 133 (10), 239(100), 240 (18), 241 (7), 342(44), 343 (12) 239 (24), 342(100), 343(21), 344 (9) 133 (11) infected wood (Table 1). The extractive substances in normal oak probably consisted partially of phenoltype esters with glycosidic linkages to carbohydrate material (Seikel andHillis 1970, Scalbert et al 1988). The bacteria apparently were consuming the carbohydrate portion of the extractive substances and, in the process, were generating residues of resorcinol and pyrogallol.…”