Stilbenolignan

picture info	Stilbenolignan Stilbenolignans are phenolic compounds formed from a stilbenoid and a lignan. The stilbenolignan aiphanol can be found in the seeds of ''Aiphanes aculeata''. Gnetucleistol F, gnetofuran A, lehmbachol D, gnetifolin F and gnetumontanin can be found in ''Gnetum cleistostachyum''. References Stilbenoids Lignans {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gnetum Cleistostachyum ''Gnetum cleistostachyum'' is a liana species in the ''Sessiles'' subsection of the genus ''Gnetum'' described from South East Yunnan. The name is still invalid and efloras states it is advisable to postpone validating it until more complete collections, particularly with seeds, can be studied. The stilbene derivatives, , gnetucleistol B, B and gnetucleistol C, C, gnetifolin A, p-hydroxycinnamic acid, piceatannol, resveratrol, , , , the stilbenolignans, , , , and , gnetucleistol D (2-methoxyoxyresveratrol), gnetucleistol E (3-methoxy-isorhapontigenin), rhapontigenin, isorhapontigenin, 4-methoxyresveratrol and pinosylvin can be found in ''G. cleistostachyum''. References External links Gnetaceae Plants described in 1975 Flora of Yunnan {{gymnosperm-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Aiphanes Aculeata ''Aiphanes horrida'' is a palm native to northern South America and Trinidad and Tobago. ''Aiphanes horrida'' is a solitary, spiny tree. In the wild it grows 3–10 metres tall (9–30 feet) tall with a stem diameter of 6–10 centimetres (2–4 inches); cultivated trees may be as much as 15 m (49') tall with a 15 cm (6") diameter. The epicarp and mesocarp of the fruit are rich in carotene and are eaten in Colombia, while the seeds are used to make candles. In parts of the Colombian Llanos, endocarps are used to play games. The range of the species is found in dry forests between sea level and 1700 m (5600') above sea level in Bolivia, Brazil, Colombia, Peru, Trinidad and Tobago and Venezuela, but is not native to Ecuador. The species is cultivated as an ornamental throughout the tropics. Many authors, including Henderson ''et al.'' (1995) and Borchenius and Bernal (1996) use ''A. aculeata'' rather than ''A. horrida'', giving Jacquin's description of '' Caryota horrida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	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 Chalconoid, chalcones. Most stilbenoids are produced by plants, and the only known exception is the antimicrobial stilbenoid drug tapinarof which is biosynthesized by the Gram-negative bacterium ''Photorhabdus luminescens.'' Chemistry Stilbenoids are hydroxylated derivatives of stilbene and have a C6–C2–C6 structure. They belong to the family of phenylpropanoids and share most of their biosynthesis pathway with Chalconoid, chalcones. Under UV irradiation, stilbene and its derivatives undergo intramolecular cyclization, called stilbene photocyclization to form dihydrophenanthrenes. Oligomeric forms are known as oligostilbenoids. Types ;Aglycones * Piceatannol in the roots of Norway spruces * Pinosylvin is a fungal toxin protecting wood from fungal infection, found in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Lignan The lignans are a large group of low molecular weight polyphenols found in plants, particularly seeds, whole grains, and vegetables. The name derives from the Latin word for "wood". Lignans are precursors to phytoestrogens. They may play a role as antifeedants in the defense of seeds and plants against herbivores. Biosynthesis and metabolism Lignans and lignin differ in their molecular weight, the former being small and soluble in water, the latter being high polymers that are undigestable. Both are polyphenolic substances derived by oxidative coupling of monolignols. Thus, most lignans feature a C18 cores, resulting from the dimerization of C9 precursors. The coupling of the lignols occurs at C8. Eight classes of lignans are: "furofuran, furan, dibenzylbutane, dibenzylbutyrolactone, aryltetralin, arylnaphthalene, dibenzocyclooctadiene, and dibenzylbutyrolactol." Many lignans are metabolized by mammalian gut microflora, producing so-called enterolignans. Food sources Fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gnetucleistol F Gnetucleistols may refer to several molecules including: * Gnetucleistol D * Gnetucleistol E * Gnetucleistol F {{Short pages monitor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Stilbenoids 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 produced by plants, and the only known exception is the antimicrobial stilbenoid drug tapinarof which is biosynthesized by the Gram-negative bacterium '' Photorhabdus luminescens.'' Chemistry Stilbenoids are hydroxylated derivatives of stilbene and have a C6–C2–C6 structure. They belong to the family of phenylpropanoids and share most of their biosynthesis pathway with chalcones. Under UV irradiation, stilbene and its derivatives undergo intramolecular cyclization, called stilbene photocyclization to form dihydrophenanthrenes. Oligomeric forms are known as oligostilbenoids. Types ;Aglycones * Piceatannol in the roots of Norway spruces * Pinosylvin is a fungal toxin protecting wood from fungal infection, found in trees of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]