Resveratrol or 3,5,4-trihydroxy-trans-stilbene is classified into phytoalexin, a phenolic compound in the stilbene
family with trans- form which is being more recurrent in processing greater bioactivity (Wenzel & Somoza, 2005) and is manufactured naturally by knotweeds, pine trees, grape vines, peanut plants, cocoa bushes, including: blueberries, raspberries, mulberries, cranberries, and bilberries (Jasinski et al., 2013).
Ortega, "Role of natural stilbenes
in the prevention of cancer," Oxidative Medicine and Cellular Longevity, vol.
The resveratrol is one of the most important natural stilbenes
that has demonstrated having health promoter properties in possessing antioxidant, anti-inflammatory, cardioprotector, antidiabetic, anticancerous, chemoprotector, and neuroprotector effects .
Sicilian Malvasia wines have high levels of natural phenolic compounds (stilbenes
and flavonoids) that represent a potential preventive antioxidant factor .
Skovronsky, "18F stilbenes
and styrylpyridines for PET imaging of A[beta] plaques in Alzheimer's disease: a miniperspective," Journal of Medicinal Chemistry, vol.
Okamoto et al., "Bis-phosphorylbridged stilbenes
synthesized by an intramolecular cascade cyclization," Organic Letters, vol.
Rosen, "Isolation and identification of stilbenes
in two varieties of Polygonum cuspidatum," Journal of Agricultural and Food Chemistry, vol.
These molecules can be sub-classified into flavonoids, phenolic acids, tannins, and stilbenes
Thus, the synthesis of stilbenes
, isoflavones, phenolic acids and flavonoids are induced by the regulation of specific genes, which are activated after bunch thinning, inducing transcriptomic changes in berries, especially at the end of the stage that delimits changes in color and softening of grapes (PASTORE et al., 2011).
hydroxyflavonoids ; 1,085 [cm.sup.-1], related to C--O groups of flavonoids and terpenes and to O--H groups of fatty acids, stilbenes
, steroids, carboxylic acids  and secondary alcohols ; 945 [cm.sup.-1], related to wagging -C[H.sub.2] of monoterpenes ; 878 [cm.sup.-1], related to the C--H wagging vibration of phenolic compounds  or to aromatic ring vibration .
They encompass a number of classes of compounds, including isoflavones, lignans, coumestans, stilbenes
, and prenylflavanoids.
(1,4,5,8,10) There are a plethora of other nonflavonoid polyphenols, many of which confer health benefits, including stilbenes
(such as resveratrol, found in red wine), lignans (such as enterodiol, found in flaxseed and flaxseed oil), lignins (found in green beans, carrots, peas, and Brazil nuts), and phenolic acids, such as hydroxybenzoic and hydroxycinnamic acids, among which caffeic and ferulic acids are often present in foods.