Plakoridine A

	Plakoridine A Plakoridine A is an alkaloid isolated from the marine sponge ''Plakortis ''Plakortis'' is a genus of marine sponges in the order Homosclerophorida, first described by Franz Eilhard Schulze in 1880. Description ''Plakortis'' sponges are characterised by having: #inorganic (spicular) skeletal complement #Skeleton compo ...'' sp. References {{alkaloid-stub Pyrrolidine alkaloids Methyl esters Phenols ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	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 synthetic compounds of similar structure may also be termed alkaloids. In addition to carbon, hydrogen and nitrogen, alkaloids may also contain oxygen, sulfur and, more rarely, other elements such as chlorine, bromine, and phosphorus.Chemical Encyclopedia: alkaloids xumuk.ru Alkaloids are produced by a large variety of organisms including bacteria , fungi , Medicinal plant, plants, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Plakortis ''Plakortis'' is a genus of marine sponges in the order Homosclerophorida, first described by Franz Eilhard Schulze in 1880. Description ''Plakortis'' sponges are characterised by having: #inorganic (spicular) skeletal complement #Skeleton composed mainly of diods, triods, and/or calthrops in one size class # Lophose diods, triods, or calthrops complement the main skeleton of non-lophose spicules # no lophose spicules # diactinal "microscleres" (microrhabs) in some species Species List of accepted species: '' Plakortis albicans'' '' Plakortis angulospiculatus'' '' Plakortis badabaluensis'' ''Plakortis bergquistae ''Plakortis bergquistae'' is a species of marine sponge in the order Homosclerophorida, first described in 2011 by Guilherme Muricy. The species epithet, ''bergquistae'', honours Patricia Bergquist. Distribution The holotype was collected nea ...'' '' Plakortis clarionensis'' '' Plakortis communis'' '' Plakortis copiosa'' '' Plakortis dariae'' '' ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Pyrrolidine Alkaloids Pyrrolidine, also known as tetrahydropyrrole, is an organic compound with the molecular formula (CH2)4NH. It is a cyclic secondary amine, also classified as a saturated heterocycle. It is a colourless liquid that is miscible with water and most organic solvents. It has a characteristic odor that has been described as "ammoniacal, fishy, shellfish-like". In addition to pyrrolidine itself, many substituted pyrrolidines are known. Production and synthesis Industrial production Pyrrolidine is prepared industrially by the reaction of 1,4-butanediol and ammonia at a temperature of 165–200 °C and a pressure of 17–21 MPa in the presence of a cobalt- and nickel oxide catalyst, which is supported on alumina. : The reaction is carried out in the liquid phase in a continuous tube- or tube bundle reactor, which is operated in the cycle gas method. The catalyst is arranged as a fixed-bed and the conversion is carried out in the downflow mode. The product is obtained after mu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Methyl Esters In organic chemistry, a methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms, having chemical formula . In formulas, the group is often abbreviated as Me. This hydrocarbon group occurs in many organic compounds. It is a very stable group in most molecules. While the methyl group is usually part of a larger molecule, bounded to the rest of the molecule by a single covalent bond (), it can be found on its own in any of three forms: methanide anion (), methylium cation () or methyl radical (). The anion has eight valence electrons, the radical seven and the cation six. All three forms are highly reactive and rarely observed. Methyl cation, anion, and radical Methyl cation The methylium cation () exists in the gas phase, but is otherwise not encountered. Some compounds are considered to be sources of the cation, and this simplification is used pervasively in organic chemistry. For example, protonation of methanol gives an electr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]