119002-89-0Relevant academic research and scientific papers
Tannins and Related Compounds. LXXII. Isolation and Characterisation of Mongolicanin (Procyanidino-ellagitannin), Mongolinin A, Acutissimin C and Vescalagin Carboxylic Acid, Novel Tannins from Quercus mongolica var. grosseserrata
Ishimaru, Kanji,Ishimatsu, Makoto,Nonaka, Gen-Ichiro,Mihashi, Kunihide,Iwase, Yukiko,Nishioka, Itsuo
, p. 3319 - 3327 (2007/10/02)
A novel procyanidino-ellagitannin, mongolicanin (1), has been isolated, together with free new tannins, mongolinin A (4), acutissimin C (7) and vescalagin carboxylic acid (8), from the bark of Quercus mongolica var. grosseserrata (Fagaceae), and the structures of these compounds were established on the basis of physicochemical data.Keywords--Quercus mongolica var. grosseserrata; Fagaceae; mongolicanin; procyanidino-ellagitannin; mongolinin A; acutissimin C; vescalagin carboxylic acid; flavano-ellagitannin; C-glycosylated ellagitannin; open-chain-form glucose
Tannins and Related Compounds. LV. Isolation and Characterization of Acutissimins A and B, Novel Tannins from Quercus and Castanea Species
Ishimaru, Kanji,Nonaka, Gen-Ichiro,Nishioka, Itsuo
, p. 602 - 610 (2007/10/02)
Two novel and closely related tannins, designated as acutissimins A (1) and B (2), have been isolated from various Fageceous plants: Quercus acutissima, Q. miyagii, Q. stenophylla, Q. mongolica var. grosseserrata and Castanea crenata.Degradative and synthetic studies combined with 1H- and 13C-NMR spectrometry and various mass spectral measurements have permitted the assignments of the structures, in which (+)-catechin (4) and the C-glycosylated ellagitannin, castalagin (3), are connected through a carbon-carbon linkage.
