Rhamnetin

	Rhamnetin Rhamnetin is an O-methylated flavonol, a type of chemical compound. It can be isolated from cloves. The structure of the molecule was discovered by Austrian chemist Josef Herzig (1853–1924). Glycosides Rhamnetin is the aglycone of xanthorhamnin Xanthorhamnin is a chemical compound. It can be isolated from buckthorn berries (''Rhamnus catharticus''). The aglycone of xanthorhamnin is rhamnetin Rhamnetin is an O-methylated flavonol, a type of chemical compound. It can be isolated from cl .... O-methylated flavonols Catechols {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	O-methylated Flavonol The O-methylated flavonoids or methoxyflavonoids are flavonoids with methylations on hydroxyl groups (methoxy bonds). O-methylation has an effect on the solubility of flavonoids. Enzymes O-methylated flavonoids formation implies the presence of specific O-methyltransferase (OMT) enzymes which accept a variety of substrates. Those enzymes mediate the O-methylation on a specific hydroxyl group, like on 4' (example in ''Catharanthus roseus'') or 3' (example in rice) positions. Those positions can be ortho, meta, para and there can be a special 3-O-methyltransferase for the 3-OH position. Calamondin orange ('' Citrus mitis'') exhibits all of those activities. Plant enzymes * Apigenin 4'-O-methyltransferase * 8-hydroxyquercetin 8-O-methyltransferase * Isoflavone 4'-O-methyltransferase * Isoflavone 7-O-methyltransferase * Isoliquiritigenin 2'-O-methyltransferase * Isoorientin 3'-O-methyltransferase * Kaempferol 4'-O-methyltransferase * Luteolin O-methyltransferase * Methylquercet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Clove Cloves are the aromatic flower buds of a tree in the family Myrtaceae, ''Syzygium aromaticum'' (). They are native to the Maluku Islands (or Moluccas) in Indonesia, and are commonly used as a spice, flavoring or fragrance in consumer products, such as toothpaste, soaps, or cosmetics. Cloves are available throughout the year owing to different harvest seasons across various countries. Etymology The word ''clove'', first used in English in the 15th century, derives via Middle English ''clow of gilofer'', Anglo-French ''clowes de gilofre'' and Old French ''clou de girofle'', from the Latin word ''clavus'' "nail". The related English word ''gillyflower'', originally meaning "clove", derives via said Old French ''girofle'' and Latin ''caryophyllon'', from the Greek ''karyophyllon'' "clove", literally "nut leaf". Botanical features The clove tree is an evergreen that grows up to tall, with large leaves and crimson flowers grouped in terminal clusters. The flower buds initiall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Josef Herzig Josef Herzig (25 September 1853 – 4 July 1924) was an Austrian chemist. Herzig was born in Sanok, Galicia, which at that time was part of Austria-Hungary. Herzig went to school in Breslau until 1874, started studying chemistry at the University of Vienna but joined August Wilhelm von Hofmann at the University of Berlin in the second semester. He worked with Robert Bunsen at the University of Heidelberg and received his PhD for work with Ludwig Barth at the University of Vienna. He later became lecturer and, in 1897, professor at the University of Vienna. He died in Vienna in 1924. Work Herzig was active in the chemistry of natural products. He succeeded in determining the structure of flavonoids quercetin, fisetin and rhamnetin as well as several alkaloid Alkaloids are a class of basic, naturally occurring organic compounds that contain at least one nitrogen atom. This group also includes some related compounds with neutral and even weakly acidic properties. Some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Xanthorhamnin Xanthorhamnin is a chemical compound. It can be isolated from buckthorn berries (''Rhamnus catharticus''). The aglycone of xanthorhamnin is rhamnetin Rhamnetin is an O-methylated flavonol, a type of chemical compound. It can be isolated from cloves. The structure of the molecule was discovered by Austrian chemist Josef Herzig (1853–1924). Glycosides Rhamnetin is the aglycone of xanthorh .... References O-methylated flavonols Flavonol glycosides {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]