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Gastrodigenin
Gastrodigenin is a phenolic compound found in the rhizome of ''Gastrodia elata''. Gastrodin is the glucoside A glucoside is a glycoside that is chemically derived from glucose. Glucosides are common in plants, but rare in animals. Glucose is produced when a glucoside is hydrolysed by purely chemical means, or decomposed by fermentation or enzymes. Th ... of gastrodigenin. See also * Habenariol, a phenolic compound found in the semi aquatic orchid Habenaria repens References Natural phenols diols Gastrodia Perfume ingredients 4-Hydroxyphenyl compounds {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habenariol
Habenariol is a phenolic compound found in the semi-aquatic orchid ''Habenaria repens''. It acts as a feeding deterrent against the freshwater crayfish ''Procambarus clarkii''. See also * Gastrodigenin Gastrodigenin is a phenolic compound found in the rhizome of ''Gastrodia elata''. Gastrodin is the glucoside A glucoside is a glycoside that is chemically derived from glucose. Glucosides are common in plants, but rare in animals. Glucose is ..., a phenolic compound found in other orchids References 4-Hydroxyphenyl compounds Habenaria Isobutyl compounds Tertiary alcohols Esters {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrodia Elata
''Gastrodia elata'' is a mycoheterotrophic perennial herb in the family Orchidaceae. It is found in Nepal, Bhutan, India, Japan, 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 Bracts are 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 pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrodin
Gastrodin is a chemical compound which is the glucoside of gastrodigenin. It has been isolated from the rhizomes of two orchid species, ''Gastrodia elata'' and '' Galeola faberi''. It can also be produced by biotransformation of 4-hydroxybenzaldehyde by '' Datura tatula'' cell cultures. ''G. elata'' rhizome is a herb used in traditional Chinese medicine to treat headache, and it is standardized in the Chinese Pharmacopoeia by gastrodin and gastrodigenin content. In line with this traditional use, gastrodin and its acetyl derivative are used in China as an over-the-counter drug to treat neurasthenia, headache, and migraine. It is available as a dietary supplement in other countries. A Chinese literature review considers it useful for a range of central nervous system The central nervous system (CNS) is the part of the nervous system consisting primarily of the brain, spinal cord and retina. The CNS is so named because the brain integrates the received information and coordinat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glucoside
A glucoside is a glycoside that is chemically derived from glucose. Glucosides are common in plants, but rare in animals. Glucose is produced when a glucoside is hydrolysed by purely chemical means, or decomposed by fermentation or enzymes. The name was originally given to plant products of this nature, in which the other part of the molecule was, in the greater number of cases, an aromatic aldehydic or phenolic compound (exceptions are Jinigrin and Jalapin or Scammonin). It has now been extended to include synthetic ethers, such as those obtained by acting on alcoholic glucose solutions with hydrochloric acid, and also the polysaccharoses, e.g. cane sugar, which appear to be ethers also. Although glucose is the most common sugar present in glucosides, many are known which yield rhamnose or iso-dulcite; these may be termed pentosides. Much attention has been given to the non-sugar parts (aglycone) of the molecules; the constitutions of many have been determined, and the comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Phenols
In biochemistry, naturally occurring phenols are natural products containing at least one phenol functional group. Phenolic compounds are produced by plants and microorganisms. Organisms sometimes synthesize phenolic compounds in response to ecological pressures such as pathogen and insect attack, UV radiation and wounding. As they are present in food consumed in human diets and in plants used in traditional medicine of several cultures, their role in human health and disease is a subject of research. Some phenols are germicidal and are used in formulating disinfectants. Classification Various Chemical classification, classification schemes can be applied. A commonly used scheme is based on the number of carbons and was devised by Jeffrey Harborne and Simmonds in 1964 and published in 1980: C6-C7-C6 Diarylheptanoids are not included in this Harborne classification. They can also be classified on the basis of their number of phenol groups. They can therefore be called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diols
A diol is a chemical compound containing two hydroxyl groups ( groups). An aliphatic diol may also be called a glycol. This pairing of functional groups is pervasive, and many subcategories have been identified. They are used as protecting groups of carbonyl groups, making them essential in synthesis of organic chemistry. The most common industrial diol is ethylene glycol. Examples of diols in which the hydroxyl functional groups are more widely separated include 1,4-butanediol and propylene-1,3-diol, or beta propylene glycol, . Synthesis of classes of diols Geminal diols A geminal diol has two hydroxyl groups bonded to the same atom. These species arise by hydration of the carbonyl compounds. The hydration is usually unfavorable, but a notable exception is formaldehyde which, in water, exists in equilibrium with methanediol H2C(OH)2. Another example is (F3C)2C(OH)2, the hydrated form of hexafluoroacetone. Many gem-diols undergo further condensation to give dimer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrodia
''Gastrodia'', commonly known as potato orchids, is a genus of terrestrial leafless orchids in the family Orchidaceae, about ninety of which have been described. Orchids in this genus have fleshy, upright stems and small to medium-sized resupinate flowers with narrow sepals and petals. They are native to Asia (China, the Russian Far East, Japan, Korea, Southeast Asia, the Indian Subcontinent), Australia, New Zealand, central Africa, and various islands of the Indian and Pacific Oceans. Description Orchids in the genus ''Gastrodia'' are leafless, terrestrial, mycotrophic herbs with a fleshy, underground rhizome and an upright flowering stem with a few to many brownish, resupinate flowers. The sepals and petals are fused to form a bell-shaped or irregular tube with the tips free. The petals are usually much smaller than the sepals and the labellum has three lobes and is fully enclosed in the tube. Taxonomy The genus ''Gastrodia'' was first formally described in 1810 by Rober ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perfume Ingredients
Perfume (, ) is a mixture of fragrant essential oils or aroma compounds (fragrances), fixatives and solvents, usually in liquid form, used to give the human body, animals, food, objects, and living-spaces an agreeable scent. Perfumes can be defined as substances that emit and diffuse a pleasant and fragrant odor. They consist of artificial mixtures of aromatic chemicals and essential oils. The 1939 Nobel Laureate for Chemistry, Leopold Ružička stated in 1945 that "right from the earliest days of scientific chemistry up to the present time, perfumes have substantially contributed to the development of organic chemistry as regards methods, systematic classification, and theory." Ancient texts and archaeological excavations show the use of perfumes in some of the earliest human civilizations. Modern perfumery began in the late 19th century with the commercial synthesis of aroma compounds such as vanillin and coumarin, which allowed for the composition of perfumes with sme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
