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Petasin
Petasin is a natural chemical compound found in plants of the genus ''Petasites''. Chemically, it is classified as a sesquiterpene and is the ester of petasol and angelic acid Angelic acid is a Carboxylic acid, monocarboxylic Saturated and unsaturated compounds, unsaturated organic acid, mostly found in the plants of the family Apiaceae. It is a volatile solid with a biting taste and pungent sour odor. It is the ''Cis†.... Petasin is believed to be responsible, at least in part, for the anti-inflammatory effects of Common Butterbur (''Petasites hybridus'') extracts. Recent study has proven that Petasin can inhibit the tumor growth and metastasis in cancer patients. References Sesquiterpenes Carboxylate esters {{ester-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Butterbur
''Petasites hybridus'', the butterbur, is a herbaceous perennial flowering plant in the family Asteraceae, native to Europe and northern Asia. Although used over centuries in traditional medicine to treat various disorders, there are no approved medical uses, but it is sold as a dietary supplement. Concerns about the potential toxic effects of pyrrolizidine alkaloids in butterbur limit its use in human and animal studies. Etymology and common names The botanical name ''Petasites'' derived from the Greek word, ''petasos'', from the plant's broad leaves resembling a wide-brimmed hat. ''Butterbur'' may have derived from the use of leaves to wrap butter centuries ago. It is also called ''bog rhubarb'', ''Devil's hat'', and ''pestilence wort''. Synonyms include ''P. officinalis'', ''P. ovatus'', ''P. vulgaris'', and ''Tussilago petasites'' L. Description The species is dioecious, the male and female flowers being borne on separate plants. In Britain, the male flowers are widespread, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element is therefore not a compound. A compound can be transformed into a different substance by a chemical reaction, which may involve interactions with other substances. In this process, bonds between atoms may be broken and/or new bonds formed. There are four major types of compounds, distinguished by how the constituent atoms are bonded together. Molecular compounds are held together by covalent bonds; ionic compounds are held together by ionic bonds; intermetallic compounds are held together by metallic bonds; coordination complexes are held together by coordinate covalent bonds. Non-stoichiometric compounds form a disputed marginal case. A chemical formula specifies the number of atoms of each element in a compound molecule, using the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petasites
''Petasites'' is a genus of flowering plants in the sunflower family, Asteraceae, that are commonly referred to as butterburs and coltsfoots.''Petasites''. Flora of North America. Volume 20, Page 635. efloras.org. They are perennial plants with thick, creeping underground s and large rhubarb-like leaves during the growing season. Most species are native to Asia or southern Europe. Characteristics The short spikes of s are produced just before the leaves in late winter (e.g. '' |
Sesquiterpene
Sesquiterpenes are a class of terpenes that consist of three isoprene units and often have the molecular formula C15H24. Like monoterpenes, sesquiterpenes may be cyclic or contain rings, including many unique combinations. Biochemical modifications such as oxidation or rearrangement produce the related sesquiterpenoids. Sesquiterpenes are found naturally in plants and insects, as semiochemicals, e.g. defensive agents or pheromones. Biosynthesis and examples The reaction of geranyl pyrophosphate with isopentenyl pyrophosphate results in the 15-carbon farnesyl pyrophosphate (FPP), which is an intermediate in the biosynthesis of sesquiterpenes such as farnesene. Cyclic sesquiterpenes are more common than cyclic monoterpenes because of the increased chain length and additional double bond in the sesquiterpene precursors. In addition to common six-membered ring systems such as the ones found in zingiberene and bisacurone, cyclization of one end of the chain to the other end can l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ester
In chemistry, an ester is a compound derived from an oxoacid (organic or inorganic) in which at least one hydroxyl group () is replaced by an alkoxy group (), as in the substitution reaction of a carboxylic acid and an alcohol. Glycerides are fatty acid esters of glycerol; they are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. They perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Phosphoesters form the backbone of DNA molecules. Nitrate esters, such as nitroglycerin, are known for their explosive properties. '' Nomenclature Etymology Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angelic Acid
Angelic acid is a monocarboxylic unsaturated organic acid, mostly found in the plants of the family Apiaceae. It is a volatile solid with a biting taste and pungent sour odor. It is the ''cis'' isomer of 2-methyl-2-butenoic acid, which easily converts to the ''trans'' isomer, tiglic acid, upon heating or reaction with inorganic acids. The reverse transformation occurs much less readily. The salts and esters of angelic acid are called angelates. Angelic acid esters are the active components of herbal medicine used against a wide range of various health disturbances including pains, fever, gout, heartburn, etc. Name and discovery Angelic acid was first isolated by the German pharmacist Ludwig Andreas Buchner (1813–1897) in 1842 from the roots of the garden plant angelica (''Angelica archangelica''), which gave the acid its name. Occurrence Angelic acid occurs in the roots of many plants, especially of the family Apiaceae. These plants include ''Angelica archangelica'', ''Peuce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biochemical Pharmacology (journal)
''Biochemical Pharmacology'' is a peer-reviewed medical journal published by Elsevier. It covers research on the pharmacodynamics and pharmacokinetics of drugs and non-therapeutic xenobiotics. The editor-in-chief is S. J. Enna, University of Kansas Medical Center, Kansas City. , accessed on February 11th, 2013 Abstracting and indexing The journal is abstracted and indexed in: According to the '''', the journal received a 2019 |
The Journal Of Clinical Investigation
The ''Journal of Clinical Investigation'' is a twice-monthly peer-reviewed medical journal covering biomedical research. It was established in 1924 and is published by the American Society for Clinical Investigation. Articles focus on the mechanisms of disease, with an emphasis on basic research, early-stage clinical studies in humans, and new research tools and techniques. The journal also publishes reviews in edited series or as stand-alone articles, commentaries on research, editorials, and feature items. The editor-in-chief is Elizabeth M. McNally (Northwestern University). Abstracting and indexing The journal is abstracted and indexed in: Editors-in-chief The following persons have been editor-in-chief of the journal: Most cited articles The following articles have received the most citations , according to Scopus Scopus is Elsevier's abstract and citation database launched in 2004. Scopus covers nearly 36,377 titles (22,794 active titles and 13,583 inactive titles) fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sesquiterpenes
Sesquiterpenes are a class of terpenes that consist of three isoprene units and often have the molecular formula C15H24. Like monoterpenes, sesquiterpenes may be cyclic or contain rings, including many unique combinations. Biochemical modifications such as oxidation or rearrangement produce the related sesquiterpenoids. Sesquiterpenes are found naturally in plants and insects, as semiochemicals, e.g. defensive agents or pheromones. Biosynthesis and examples The reaction of geranyl pyrophosphate with isopentenyl pyrophosphate results in the 15-carbon farnesyl pyrophosphate (FPP), which is an intermediate in the biosynthesis of sesquiterpenes such as farnesene. Cyclic sesquiterpenes are more common than cyclic monoterpenes because of the increased chain length and additional double bond in the sesquiterpene precursors. In addition to common six-membered ring systems such as the ones found in zingiberene and bisacurone, cyclization of one end of the chain to the other end can l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
