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2,4-Bis(4-hydroxybenzyl)phenol
2,4-Bis(4-hydroxybenzyl)phenol is a phenolic compound produced by the saprophytic orchid ''Gastrodia elata'' and by the myco-heterotroph orchid ''Galeola faberi ''Galeola faberi'' is an orchid species in the genus ''Galeola'' found in central and southern China, as well as in Nepal, the eastern Himalayas, Vietnam and Sumatra. The phenolic compounds p-hydroxybenzaldehyde, 4,4'-dihydroxy-diphenyl methan ...''. References Polyphenols Orchids {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phenol
Phenol (also called carbolic acid) is an aromatic organic compound with the molecular formula . It is a white crystalline solid that is volatile. The molecule consists of a phenyl group () bonded to a hydroxy group (). Mildly acidic, it requires careful handling because it can cause chemical burns. Phenol was first extracted from coal tar, but today is produced on a large scale (about 7 billion kg/year) from petroleum-derived feedstocks. It is an important industrial commodity as a precursor to many materials and useful compounds. It is primarily used to synthesize plastics and related materials. Phenol and its chemical derivatives are essential for production of polycarbonates, epoxies, Bakelite, nylon, detergents, herbicides such as phenoxy herbicides, and numerous pharmaceutical drugs. Properties Phenol is an organic compound appreciably soluble in water, with about 84.2 g dissolving in 1000 mL (0.895 M). Homogeneous mixtures of phenol and water at phenol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrodia Elata
''Gastrodia elata'' is a saprophytic perennial herb in the family Orchidaceae. It is found in Nepal, Bhutan, India, Japan, North Korea, Siberia, Taiwan, and China. Description The orchid has an 8–12 centimeters long elliptical underground rhizome with a diameter of 3–5 centimeters but may grow up to 7 centimeters. The stem is erect with a height of 0.3–1 meter up to 2 meters, the orange yellow, tan, cylinder, and leafless. The flowered pale olivine or the orange red, the scape is length 5–30 centimeters, longest may be 50 centimeters. Floral Bractsare long lanceolate, length 1-1.5 centimeters; Pedicel and ovary of branch 0.7–1.2 centimeter, slightly short in colored bract; The sepal and the petal produce a slanting pot shape perianth tube, the perianth tube long the approximately 1 centimeter, the diameter 5–7 millimeters. The labellum is white, circular, with a length of 6–7 millimeters and width of 3–4 millimeters, the tip 3 cracks, the base pastes the tight pis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galeola Faberi
''Galeola faberi'' is an orchid species in the genus ''Galeola'' found in central and southern China, as well as in Nepal, the eastern Himalayas, Vietnam and Sumatra. The phenolic compounds p-hydroxybenzaldehyde, 4,4'-dihydroxy-diphenyl methane, 2,4-bis(4-hydroxybenzyl) phenol, 5-methoxy-3-(2-phenyl-E-ethenyl)-2,4-bis (4-hydroxybenzyl) phenol (IV), p-hydroxybenzyl alcohol (V), 4-(beta-D-glucopyranosyloxy) benzyl alcohol (gastrodin Gastrodin is a chemical compound which is the glucoside of gastrodigenin. It has been isolated from the orchid ''Gastrodia elata'' and from the rhizome of ''Galeola faberi''. It can also be produced by biotransformation of 4-hydroxybenzaldehyde ...), bis -(beta-D-glucopyranosyloxy) benzyl(S)-2-isopropylmalate and bis -(beta-D-glucopyranosyloxy) benzyl(S)-2-sec-butylmalate can be isolated from the rhizome of ''G. faberi''. References Orchids of China Orchids of India Orchids of Nepal Flora of Sumatra Orchids of Vietnam Orchids of Yun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyphenols
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 which have been used historically as dyes and for tanning garments. Etymology The name derives from the Ancient Greek word (''polus'', meaning "many, much") and the word phenol which refers to a chemical structure formed by attaching to an aromatic benzenoid (phenyl) ring to a hydroxyl (-OH) group as is found in alcohols (hence the ''-ol'' suffix). The term polyphenol has been in use at least since 1894. Definition The term polyphenol is not well-defined, but is generally agreed that they are natural products "having a polyphenol structure (i.e., several hydroxyl groups on aromatic rings)" including four principal classes: "phenolic acids, flavonoids, stilbenes, and lignans". *Flavonoids include flavones, flavonols, flavanols, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
