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Flavan-4-ol
The flavan-4-ols (3-deoxyflavonoids) are flavone-derived Alcohol (chemistry), alcohols and a family of flavonoids. Flavan-4-ols are colorless precursor compounds that polymerize to form red phlobaphene pigments. They can be found in the sorghum. Glycosides (abacopterins abacopterin A, A, abacopterin B, B, abacopterin C, C and abacopterin D, D together with triphyllin A and 6,8-dimethyl-7-hydroxy-4‘-methoxyanthocyanidin-5-O-β-d-glucopyranoside) can be isolated from a methanol extract of the rhizomes of ''Abacopteris penangiana''. Known flavan-4-ols * Apiforol * Luteoforol Metabolism Flavanone 4-reductase is an enzyme that uses (2''S'')-flavan-4-ol and NADP+ to produce (2''S'')-flavanone, NADPH, and H+. Spectral data These compounds have absorption maxima of 564 nm. References {{flavan-4ol Flavan-4-ols, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flavanone 4-reductase
In enzymology, a flavanone 4-reductase () is an enzyme that catalysis, catalyzes the chemical reaction :(2S)-flavan-4-ol + NADP+ \rightleftharpoons (2S)-flavanone + NADPH + H+ Thus, the two substrate (biochemistry), substrates of this enzyme are (2S)-flavan-4-ol and nicotinamide adenine dinucleotide phosphate, NADP+, whereas its 3 product (chemistry), products are (2S)-flavanone, nicotinamide adenine dinucleotide phosphate, NADPH, and hydrogen ion, H+. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The List of enzymes, systematic name of this enzyme class is (2S)-flavan-4-ol:NADP+ 4-oxidoreductase. This enzyme participates in flavonoid biosynthesis. References * EC 1.1.1 NADPH-dependent enzymes Enzymes of unknown structure Flavanones metabolism {{1.1.1-enzyme-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phlobaphene
Phlobaphenes (or phlobaphens, CAS No.:71663-19-9) are reddish, alcohol-soluble and water-insoluble phenolic substances. They can be extracted from plants, or be the result from treatment of tannin extracts with mineral acids (tanner's red). The name ''phlobaphen'' come from the Greek roots φλoιὀς (''phloios'') meaning bark and βαφή (''baphe'') meaning dye. No biological activities have currently been reported for phlobaphenes. Phlobaphenes from hawthorn fruits (''Fructus Crataegi'') may have a specific action on the coronary circulation. They are converted into humins in soils. Naturally formed phlobaphenes Natural phlobaphenes are the common bark, pericarp, cob glume and seed coat (''testa'') pigments. They have not been found in flowers, unless the brown and black pigments in the involucrum of certain compositae are found to be of the phlobaphene type. In bark, phlobaphenes accumulate in the phellem layer of cork cambium, part of the suberin mixture. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luteoforol
Luteoforol is a chemical compound belonging to the flavan-4-ol class of flavonoids. Luteoforol is induced in pome In botany, a pome is a type of fruit produced by flowering plants in the subtribe Malinae of the family Rosaceae. Pome fruits consist of a central "core" containing multiple small seeds, which is enveloped by a tough membrane and surrounded by a ... fruits by prohexadione-calcium. References Flavan-4-ols Catechols Resorcinols {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flavanone
The flavanones, a type of flavonoids, are various aromatic, colorless ketones derived from flavone that often occur in plants as glycosides. List of flavanones * Blumeatin * Butin * Dichamanetin * Eriodictyol * Hesperetin * Hesperidin * Homoeriodictyol * Isosakuranetin * Naringenin * Naringin * Pinocembrin * Poncirin * Sakuranetin * Sakuranin * Sterubin * Pinostrobin Metabolism The enzyme chalcone isomerase uses a chalcone-like compound to produce a flavanone. Flavanone 4-reductase is an enzyme that uses (2''S'')-flavan-4-ol The flavan-4-ols (3-deoxyflavonoids) are flavone-derived Alcohol (chemistry), alcohols and a family of flavonoids. Flavan-4-ols are colorless precursor compounds that polymerize to form red phlobaphene pigments. They can be found in the sorghum. Gl ... and NADP+ to produce (2''S'')-flavanone, NADPH, and H+. Synthesis Numerous methods exist for the enantioselective chemical and biochemical synthesis of flavanones and related compounds. Re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flavone
Flavone is an organic compound with the formula . A white solid, flavone is a derivative of chromone with a phenyl (Ph) substituent adjacent to the ether group. The compound is of little direct practical importance, but substituted derivatives, the flavones and flavonoids are a large class of nutritionally important natural products. Flavone can be prepared in the laboratory by cyclization of 2-hydrox acetophenone. Isomeric with flavone is isoflavone, where the phenyl group is adjacent to the ketone In organic chemistry, a ketone is an organic compound with the structure , where R and R' can be a variety of carbon-containing substituents. Ketones contain a carbonyl group (a carbon-oxygen double bond C=O). The simplest ketone is acetone ( .... References {{Flavones ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcohol (chemistry)
In chemistry, an alcohol (), is a type of organic compound that carries at least one hydroxyl () functional group bound to a Saturated and unsaturated compounds, saturated carbon atom. Alcohols range from the simple, like methanol and ethanol, to complex, like sugar alcohols and cholesterol. The presence of an OH group strongly modifies the properties of Hydrocarbon, hydrocarbons, conferring Hydrophile, hydrophilic (water-loving) properties. The OH group provides a site at which many reactions can occur. History The flammable nature of the exhalations of wine was already known to ancient natural philosophers such as Aristotle (384–322 BCE), Theophrastus (–287 BCE), and Pliny the Elder (23/24–79 CE). However, this did not immediately lead to the isolation of alcohol, even despite the development of more advanced distillation techniques in second- and third-century Roman Egypt. An important recognition, first found in one of the writings attributed to Jabir ibn Hayyan, J� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
