It exists in plants of several families, such as: Cyperaceae, Dipterocarpaceae, Gnetaceae, Fabaceae, Leguminoseae, Pinaceae, Poaceae, and Vitaceae, and is synthesized from the phenylpropanoid substrates that are present in all higher plants and it also involves the activity of
stilbene synthase or resveratrol synthase (STS) (Jeandet).
Ortega, "Role of natural
stilbenes in the prevention of cancer," Oxidative Medicine and Cellular Longevity, vol.
Yoshikawa, "Antioxidant constituents from rhubarb: structural requirements of
stilbenes for the activity and structures of two new anthraquinone glucosides," Bioorganic and Medicinal Chemistry, vol.
Baek, "Production of a major
stilbene phytoalexin, resveratrol in peanut (Arachis hypogaea) and peanut products: a mini review," Reviews in Environmental Science and Bio/Technology, vol.
Bolling, "Characterisation of
stilbenes in California almonds (Prunus dulcis) by UHPLC-MS," Food Chemistry, vol.
Compounds 5 and 6 had
stilbene structures and showed potent inhibitory activity, with [IC.sub.50] values of 6.73 [micro]M and 11.05 [micro]M as compared to the positive control, Trolox, with an [IC.sub.50] value of 16.83 [micro]M.
For example, the 1H-NMR spectrum of 2i exhibits one singlet for the same two olefin protons in 6.5 ppm that is in agreement with (Z)-structure for
stilbene. Aromatic protons appeared in the region between 7.3-7.7 ppm with expected pattern for mono substituted benzene.
Pterostilbene and resveratrol are both
stilbene compounds and are structurally related.
Solution-Grown Crystals for High-Energy Neutron Detection made of
stilbene constitute the best known scintillator material capable of definitively distinguishing neutrons from gamma rays.
The major peak-to-peak mass increments were 133, 227, 297, 315 to 319, 429, and 445 Da, which corresponded to structures (I) resorcinol, (II)
stilbene type, (III) fisetinidin, (IV) catechin, (V) fisetinidin-resorcinol, and (VI) catechin-resorcinol repeating units, respectively (Table 1).
Photorhabdus produces a bioactive secondary metabolite called
stilbene (ST).
Application of high-speed counter-current chromatography combined with macroporous resin for rapid enrichment and separation of three anthraquinone glycosides and one
stilbene glycoside from Rheum tanguticum.
