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Cornusiin E
Cornusiin E is a dimeric derivative of tellimagrandin II Tellimagrandin II is the first of the ellagitannins formed from 1,2,3,4,6-pentagalloyl-glucose. It can be found in '' Geum japonicum'' and ''Syzygium aromaticum'' (clove).Purification and Characterization of Eugeniin as an Anti-herpesvirus Compoun ... found in '' Tellima grandiflora''. References External links Cornusiin E at biocyc.org Ellagitannins Tannin dimers {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tellimagrandin II
Tellimagrandin II is the first of the ellagitannins formed from 1,2,3,4,6-pentagalloyl-glucose. It can be found in '' Geum japonicum'' and ''Syzygium aromaticum'' (clove).Purification and Characterization of Eugeniin as an Anti-herpesvirus Compound from Geum japonicum and Syzygium aromaticum. Masahiko Kurokawa, Toyoharu Hozumi, Purusotam Basnet, Michio Nakano, Shigetoshi Kadota, Tuneo Namba, Takashi Kawana and Kimiyasu Shiraki, JPET, February 1, 1998 vol. 284 no. 2, pages 728-735article Tellimagrandin II is an isomer of punicafolin or nupharin A, but the hexahydroxydiphenoyl group is not attached to the same hydroxyl groups in the glucose molecule. The compound shows anti-herpesvirus properties. Metabolism It is formed by oxidation of pentagalloyl glucose in '' Tellima grandiflora'' by the enzyme pentagalloylglucose: O(2) oxidoreductase, a laccase-type phenol oxidase. It is further oxidized to casuarictin, a molecule formed via oxidative dehydrogenation of 2 other galloyl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tellima Grandiflora
''Tellima grandiflora'', the bigflower tellima or fringecups, is a herbaceous perennial flowering plant in the family Saxifragaceae. It is the only species in the genus ''Tellima''. Description It has rounded stalked leaves mostly growing from the base emerging from a rootstock and bluntly toothed reaching heights of 30 cm.Parnell, J. and Curtis, T. 2012. ''Webb's An Irish Flora''. Cork University Press. It is evergreen in mild winters. Flowers are borne in spring and early summer, on spikes, terminal racemes, up to 60 cm high. The green calyx is 6–8 mm long; the five flower petals are greenish-white to purple, pinnately divided and spreading. The petals are deeply fringed. It has 10 stamens and 2 styles. Distribution The plant is a native of moist forests in western North America, from Alaska and British Columbia to northern California. It can be a garden escape and become naturalised in some other areas, ''e.g.'' Ireland and Great Britain. Although it is secure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellagitannins
The ellagitannins are a diverse class of hydrolyzable tannins, a type of polyphenol formed primarily from the oxidative linkage of galloyl groups in 1,2,3,4,6-pentagalloyl glucose. Ellagitannins differ from gallotannins, in that their galloyl groups are linked through C-C bonds, whereas the galloyl groups in gallotannins are linked by depside bonds. Ellagitannins contain various numbers of hexahydroxydiphenoyl units, as well as galloyl units and/or sanguisorboyl units bounded to sugar moiety. In order to determine the quantity of every individual unit, the hydrolysis of the extracts with trifluoroacetic acid in methanol/water system is performed. Hexahydroxydiphenic acid, created after hydrolysis, spontaneously lactonized to ellagic acid, and sanguisorbic acid to sanguisorbic acid dilactone, while gallic acid remains intact. Ellagitannins generally form macrocycles, whereas gallotannins do not. Examples * Castalagin * Castalin * Casuarictin * Grandinin * Oenothein B from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
