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Oligostilbenoid
Oligostilbenoids (oligo- or polystilbenes) are oligomeric forms of stilbenoids. Some molecules are large enough to be considered polyphenols and constitute a class of tannins. Examples Dimers * Ampelopsin A * Epsilon-viniferin * Pallidol * Quadrangularin A Trimers * α-Viniferin * Ampelopsin E * ''trans''-Diptoindonesin B * Gnetin H Tetramers * cajyphenol A * cajyphenol B * Flexuosol A * Hemsleyanol D * Hopeaphenol * Vaticanol B * R2-Viniferin (syn. Vitisin A) Modified * Diptoindonesin C can be isolated from the bark of '' Shorea pinanga'' Other * Diptoindonesin F can be isolated from the bark of ''Shorea gibbosa'' Glycosides * Diptoindonesin A Diptoindonesin A is a C- glucoside of ε-viniferin isolated from the two Dipterocarpaceae '' Shorea seminis'' and ''Dryobalanops aromatica ''Dryobalanops aromatica'', commonly known as Borneo camphor, camphor tree, Malay camphor, or Sumatran c ... References External links * {{oligostilbenoid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tannin
Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' (from Anglo-Norman ''tanner'', from Medieval Latin ''tannāre'', from ''tannum'', oak bark) refers to the use of oak and other bark in tanning animal hides into leather. By extension, the term ''tannin'' is widely applied to any large polyphenolic compound containing sufficient hydroxyls and other suitable groups (such as carboxyls) to form strong complexes with various macromolecules. The tannin compounds are widely distributed in many species of plants, where they play a role in protection from predation (acting as pesticides) and might help in regulating plant growth. The astringency from the tannins is what causes the dry and puckery feeling in the mouth following the consumption of unripened fruit, red wine or tea. Likewise, the destruction or modification of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hopeaphenol
Hopeaphenol is a stilbenoid. It is a resveratrol tetramer. It has been first isolated from Dipterocarpaceae like '' Shorea ovalis''. It has also been isolated from wines from North Africa. It shows an opposite effect to vitisin A on apoptosis of myocytes isolated from adult rat heart. See also * Phenolic compounds in wine The phenolic content in wine refers to the phenolic compounds—natural phenol and polyphenols—in wine, which include a large group of several hundred chemical compounds that affect the taste, color and mouthfeel of wine. These compounds include ... References {{Oligostilbenoid Resveratrol oligomers Natural phenol tetramers Wine chemistry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha-Viniferin
α-Viniferin is a stilbene trimer. It can be isolated from ''Caragana chamlagu'' and from '' Caragana sinica'' and from the stem bark of ''Dryobalanops aromatica''. It is also present in relation to resistance to ''Botrytis cinerea'' and ''Plasmopara viticola'' in ''Vitis vinifera'' and ''Vitis riparia''.Disease resistance of Vitis spp. and the production of the stress metabolites resveratrol, epsilon -viniferin, alpha -viniferin and pterostilbene. Langcake P, Physiological Plant Pathology, 1981, Vol. 18, No. 2, pages 213-226abstract) It has been shown to inhibit acetylcholinesterase Acetylcholinesterase (HGNC symbol ACHE; EC 3.1.1.7; systematic name acetylcholine acetylhydrolase), also known as AChE, AChase or acetylhydrolase, is the primary cholinesterase in the body. It is an enzyme Enzymes () are proteins that a .... References Resveratrol oligomers Acetylcholinesterase inhibitors {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R2-Viniferin
Vitisin A is a resveratrol tetramer (chemistry), tetramer found in plants of the genus ''Vitis''. It is a complex of two resveratrol dimers, (+)-epsilon-viniferin and ampelopsin B. It shows an opposite effect to hopeaphenol on apoptosis of myocytes isolated from adult rat heart. References External links Website of the Schröder group Resveratrol oligomers Natural phenol tetramers Grape {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flexuosol A
Flexuosol A is a resveratrol tetramer found in ''Vitis flexuosa ''Vitis flexuosa'' is a species of liana in the grape family. It has a very large native range in Asian tropical and temperate climate zones. Distribution The vine is native to: * East Asia in Taiwan; the Koreas, Hong Kong; the Chinese provi ...''. References Resveratrol oligomers Natural phenol tetramers Grape {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trans-Diptoindonesin B
''trans''-Diptoindonesin B is an oligomeric stilbenoid. It is a resveratrol trimer. It can be isolated from ''Dryobalanops oblongifolia ''Dryobalanops oblongifolia'' is a species of plant in the family Dipterocarpaceae, native to regions of Southeast Asia and Maritime Southeast Asia. The species name is derived from Latin (' = rather long and leaf (' = leaf); and refers to the s ...''. References Resveratrol oligomers {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diptoindonesin A
Diptoindonesin A is a C- glucoside of ε-viniferin isolated from the two Dipterocarpaceae '' Shorea seminis'' and ''Dryobalanops aromatica ''Dryobalanops aromatica'', commonly known as Borneo camphor, camphor tree, Malay camphor, or Sumatran camphor, is a species of critically endangered plant in the family Dipterocarpaceae. The species name ''aromatica'' is derived from Latin (''ar ...''. References External links * Resveratrol oligomers Stilbenoid dimers Stilbenoid glycosides Phenol glucosides C-glycoside natural phenols {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadrangularin A
Quadrangularin A is an oligostilbene found in ''Cissus quadrangularis'' and in '' Parthenocissus laetevirens''.Characterization of polyphenol compounds from the roots and stems of Parthenocissus laetevirens by high-performance liquid chromatography/tandem mass spectrometry. Juanjuan Chen, Shan He, Hui Mao, Cuirong Sun and Yuanjiang Pan, Rapid Commun. Mass Spectrom., 2009, volume 23, pages 737–744, It is a resveratrol dimer Dimer may refer to: * Dimer (chemistry), a chemical structure formed from two similar sub-units ** Protein dimer, a protein quaternary structure ** d-dimer * Dimer model, an item in statistical mechanics, based on ''domino tiling'' * Julius Dimer ( .... References Resveratrol oligomers Stilbenoid dimers {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pallidol
Pallidol is a resveratrol dimer. It can be found in ''red wine Red wine is a type of wine made from dark-colored grape varieties. The color of the wine can range from intense violet, typical of young wines, through to brick red for mature wines and brown for older red wines. The juice from most purple grap ...'', in '' Cissus pallida'' or in '' Parthenocissus laetevirens''.Characterization of polyphenol compounds from the roots and stems of Parthenocissus laetevirens by high-performance liquid chromatography/tandem mass spectrometry. Juanjuan Chen, Shan He, Hui Mao, Cuirong Sun and Yuanjiang Pan, Rapid Commun. Mass Spectrom. 2009, 23, pp. 737–744, References External links Pallidol on www.phenol-explorer.eu Resveratrol oligomers Stilbenoid dimers Wine chemistry {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ampelopsin A
Ampelopsin A is a resveratrol dimer found in ''Ampelopsis glandulosa ''Ampelopsis glandulosa'' is a species of plant native to China, Japan, India, Nepal, Myanmar, Vietnam, and the Philippines. Varieties Several varieties are distinguished: * var. ''hancei'' * var. ''kulingensis'' * var. ''glandulosa'' * var ...'' var. ''hancei'' (formerly ''A. brevipedunculata'' var. ''hancei'').Chemical determination of the absolute structures of resveratrol dimers, ampelopsins A, B, D and F. Yoshiaki Takaya, Ke-Xu Yan†, Kenji Terashima, Junko Ito and Masatake Niwa, Tetrahedron, Volume 58, Issue 36, 2 September 2002, Pages 7259–7265, References External links kanaya.naist.jp/knapsack_jsp Resveratrol oligomers Stilbenoid dimers Ampelopsis {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ampelopsin E
Ampelopsin, also known as dihydromyricetin and DHM, when purported as an effective ingredient in supplements and other tonics, is a flavanonol, a type of flavonoid. It is extracted from the Japanese raisin tree and found in '' Ampelopsis'' species ''japonica'', ''megalophylla'', and ''grossedentata''; ''Cercidiphyllum japonicum''; ''Hovenia dulcis''; '' Rhododendron cinnabarinum''; some ''Pinus'' species; and some ''Cedrus'' species, as well as in ''Salix sachalinensis''. ''Hovenia dulcis'' has been used in traditional Japanese, Chinese, and Korean medicines to treat fever, parasitic infection, as a laxative, and a treatment of liver diseases, and as a hangover treatment. Methods have been developed to extract ampelopsin on a larger scale, and laboratory research has been conducted with the compound to see if it might be useful as a drug in any of the conditions for which the parent plant has been traditionally used. Research Research suggests that DHM protects against DOX-i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
