Oligostilbenoids (oligo- or polystilbenes) are oligomeric forms of

stilbenoid Stilbenoids are hydroxylated derivatives of stilbene. They have a C6–C2–C6 structure. In biochemical terms, they belong to the family of phenylpropanoids and share most of their biosynthesis pathway with chalcones. Most stilbenoids are prod ...

s. Some molecules are large enough to be considered

polyphenol Polyphenols () are a large family of naturally occurring organic compounds characterized by multiples of phenol units. They are abundant in plants and structurally diverse. Polyphenols include flavonoids, tannic acid, and ellagitannin, some of ...

s and constitute a class of

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'', ...

Examples

Dimers

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: ...

* Epsilon-viniferin * Pallidol * Quadrangularin A

Trimers

α-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 ''Plasm ...

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 ...

* ''trans''-Diptoindonesin B * Gnetin H

Tetramers

* cajyphenol A * cajyphenol B * Flexuosol A * Hemsleyanol D *

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 ...

* Vaticanol B *

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 myocy ...

(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 ''Shorea gibbosa'' (also called yellow meranti) is a large Tropical rainforest#Emergent layer, emergent rainforest tree species in the family Dipterocarpaceae. It is native to Sumatra, Borneo, Peninsular Malaysia and Singapore. The tallest measur ...

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