82203-11-0Relevant academic research and scientific papers
New ellagitannins from Tiencha and their inhibitory activity against dental plaque
Nakano, Fusako,Miyoshi, Shozo,Murakami, Toshiyuki
, p. 545 - 552 (2017)
Four new galloyl-oxygen-diphenyl (GOD)-type ellagitannins, brambliins A–D (1–4), were isolated from the leaves of Rubus suavissimus. Their structures were elucidated by extensive spectroscopic analyses and the absolute configurations of 1–4 were determined by chemical and phytochemical evidence. These GOD-type ellagitannins inhibited the formation of dental plaque, which is beneficial for oral hygiene.
Tannins and related polyphenols of rosaceous medicinal plants. XII. Roshenins A-E, dimeric hydrolyzable tannins from Rosa henryi Boul.
Yoshida,Feng,Okuda
, p. 1997 - 2001 (2007/10/02)
Five new hydrolyzable tannin dimers, roshenins A-E, and eight known tannins and related polyphenols [(+)-catechin, (-)-epicatechin, procyanidins B-3 and B-4, sanguisorbic acid dilactone, sanguiins H-2, H-6 and lambertianin A], have been isolated from the root of Rosa henryi Boul. The structures of roshenins A-E (9-12, 19), which have a sanguisorboyl group as a linking unit between monomeric components, were established on the basis of spectral and chemical evidence.
Tannins and Related Compounds. Part 28. Revision of the Structures of Sanguiins H-6, H-2 and H-3, and Isolation and Characterization of Sanguiin H-11, a Novel Tetrameric Hydrolysable Tannin and Seven Related Tannins, from Sanguisorba officinalis
Tanaka, Takashi,Nonaka, Gen-ichiro,Nishioka, Itsuo
, p. 2001 - 2029 (2007/10/02)
The isolation and characterization of one tetrameric, three dimeric and four monomeric hydrolysable tannins from the underground parts of Sanguisorba officinalis (Rosaceae) are reported.The tetrameric and dimeric tannins contain both hexahydroxydiphenoyl and sanguisorboyl ester group(s) attached to the 2,3- and/or 4,6-positions in the α- and β-glucopyranose rings with the 4C1 conformation.The monomeric tannins are related to these tannins in that they contain either a hexahydroxydiphenoyl or sanguisorboyl ester group similarly bonded to the 4C1 glucopyranose moiety.The absence of a trimeric hydrolysable tannin suggests that the tetrameric tannin may be derived biosynthetically from two moles of sanguiin H-6 by a C-O oxidative coupling.A revision of the structures of sanguiins H-6, H-2 and H-3 isolated previously from the same plant source is also described.
