102382-32-1Relevant articles and documents
Tannins and Related Compounds. Part 37.1 Isolation and Structure Elucidation of Elaeocarpusin, a Novel Ellagitannin from Elaeocarpus sylvestris var. Ellipticus
Tanaka, Takashi,Nonaka, Gen-ichiro,Nishioka, Itsuo,Miyahara, Kazumoto,Kawasaki, Toshio
, p. 369 - 376 (2007/10/02)
A new hydrolysable tannin, elaeocarpusin, isolated from the leaves of Elaeocarpus sylvestris var.Ellipticus, has been characterized on the basis of chemical, spectroscopic, and X-ray analyses to be a novel ellagitannin in which a unique acid ester group probably derived by a condensation of a hexahydroxydiphenoyl group and dehydroascorbic acid is attached to the 2,4-positions of 1-O-galloyl-3,6-(R)-hexahydroxydiphenoyl-D-glucopyranose (corilagin).This structural feature suggest the possibility of the participation of dehydroascorbic acid as a co-enzyme in oxidative metabolism of the hexahydroxydiphenoyl group to the corresponding dehydro group.