|
Herniarin
Herniarin is a natural chemical compound. Chemically, it can be considered a methoxy derivative of coumarin or a methyl 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 ... derivative of umbelliferone. Herniarin is found in ''Herniaria glabra'', ''Ayapana triplinervis'' and in species of the genus ''Prunus'' (''Prunus mahaleb, P. mahaleb'', ''Prunus pensylvanica, P. pensylvanica'', and ''Prunus maximowiczii, P. maximowiczii''). References O-methylated coumarins {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coumarin
Coumarin () or 2''H''-chromen-2-one is an aromatic organic chemical compound with formula . Its molecule can be described as a benzene molecule with two adjacent hydrogen atoms replaced by a lactone-like chain , forming a second six-membered heterocycle that shares two carbons with the benzene ring. It can be placed in the benzopyrone chemical class and considered as a lactone. Coumarin is a colorless crystalline solid with a sweet odor resembling the scent of vanilla and a bitter taste. It is found in many plants, where it may serve as a chemical defense against predators. By inhibiting synthesis of vitamin K, a related compound is used as the prescription drug warfarin – an anticoagulant – to inhibit formation of blood clots, deep vein thrombosis, and pulmonary embolism. Etymology Coumarin is derived from ''coumarou'', the French word for the tonka bean. The word ''tonka'' for the tonka bean is taken from the Galibi (Carib) tongue spoken by natives of French G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herniaria Glabra
''Herniaria glabra'', the smooth rupturewort, is a plant of the family Caryophyllaceae, and grows in North America and Europe. It contains herniarin Herniarin is a natural chemical compound. Chemically, it can be considered a methoxy derivative of coumarin or a methyl derivative of umbelliferone. Herniarin is found in ''Herniaria glabra'', ''Ayapana triplinervis ''Ayapana triplinervis'' ( ..., a methoxy analog of umbelliferone. References External links * glabra Flora of Europe Flora of Lebanon Plants described in 1753 Taxa named by Carl Linnaeus {{Caryophyllaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ayapana Triplinervis
''Ayapana triplinervis'' (aya-pana, water hemp) is a tropical American shrub in the family Asteraceae. This plant has long slender leaves which are often used in traditional medicine. The flowers are pale pink and the thin, hairless stem is reddish in color. Description ''Ayapana triplinervis'' is an ascending, slender perennial. Its leaves are purple, subsessile, lanceolate, 3-nerved, acuminate, subentire, and glabrous. Inflorescence is a lax, few-headed corymb, heads pedicellate, about 20-flowered. Flowers are slaty blue. Chemical constituents ''Ayapana triplinervis'' is a source of several coumarin derivatives. The leaves contain a volatile essential oil, ayapana oil, 1.14%. This oil contains the coumarins ayapanin (herniarin) and ayapin, as well as other chemical compounds including stigmasterol, vitamin C, and carotene. The essential oil also contains thymohydroquinone dimethyl ether. The plant yields cineol, α-phellandrene, alpha-terneol, ayapanin, ayapin, bor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methoxy
In organic chemistry, a methoxy group is the functional group consisting of a methyl group bound to oxygen. This alkoxy group has the formula . On a benzene ring, the Hammett equation classifies a methoxy substituent at the ''para'' position as an electron-donating group, but as an electron-withdrawing group if at the ''meta'' position. At the ''ortho'' position, steric effects are likely to cause a significant alteration in the Hammett equation prediction which otherwise follows the same trend as that of the ''para'' position. Occurrence The simplest of methoxy compounds are methanol and dimethyl ether. Other methoxy ethers include anisole and vanillin. Many alkoxides contain methoxy groups, e.g. tetramethyl orthosilicate and titanium methoxide. Such compounds are often classified as methoxides. Esters with a methoxy group can be referred to as methyl esters, and the —COOCH3 substituent is called a methoxycarbonyl. Biosynthesis In nature, methoxy groups are found on nucleosi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derivative (chemistry)
In chemistry, a derivative is a compound that is derived from a similar compound by a chemical reaction. In the past, derivative also meant a compound that ''can be imagined to'' arise from another compound, if one atom or group of atoms is replaced with another atom or group of atoms, but modern chemical language now uses the term structural analog for this meaning, thus eliminating ambiguity. The term "structural analogue" is common in organic chemistry. In biochemistry, the word is used for compounds that at least theoretically can be formed from the precursor compound. Chemical derivatives may be used to facilitate analysis. For example, melting point (MP) analysis can assist in identification of many organic compounds. A crystalline derivative may be prepared, such as a semicarbazone or 2,4-dinitrophenylhydrazone (derived from aldehydes or ketones), as a simple way of verifying the identity of the original compound, assuming that a table of derivative MP values is available ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methyl
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 elect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umbelliferone
Umbelliferone, also known as 7-hydroxycoumarin, hydrangine, skimmetine, and ''beta''-umbelliferone, is a natural product of the coumarin family. It absorbs ultraviolet light strongly at several wavelengths. There are some indications that this chemical is antimutagenic, it is used in sunscreens. Umbelliferone has been reported to have antioxidant properties. It is a yellowish-white crystalline solid that has a slight solubility in hot water, but high solubility in ethanol. Natural occurrences and name Umbelliferone's name is from the umbelliferae family of plants, and the plant family in turn was named for their umbrella-shaped inflorescences, each called an umbel. Umbelliferone occurs in many familiar plants from the Apiaceae (Umbelliferae) family such as carrot, coriander and garden angelica, as well as in plants from other families, such as the mouse-ear hawkweed (''Hieracium pilosella'', Asteraceae) or the bigleaf hydrangea (''Hydrangea macrophylla'', Hydrangeaceae, under ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prunus Mahaleb
''Prunus mahaleb'', the mahaleb cherry or St Lucie cherry, is a species of cherry tree. The tree is cultivated for a spice obtained from the seeds inside the cherry stones. The seeds have a fragrant smell and have a taste comparable to bitter almonds with cherry notes. The tree is native to central and southern Europe, Iran and parts of central Asia. It is adjudged to be native in northwestern Europe or at least it is naturalized there.Euro+Med Plantbase Project''Prunus mahaleb''Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins . It is a deciduous tree or large shrub, growing to 2–10 m (rarely up to 12 m) tall with a trunk up to 40 cm diameter. Description The tree's bark is grey-brown, with conspicuous lenticels on young stems, and shallowly fissured on old trunks. The leaves are long, 1–4 cm. wide, alternate, clustered at the end of alternately arranged twigs, ovate to cordate, pointed, have serrate edges, longitudinal venation and are glabrous and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prunus Pensylvanica
''Prunus pensylvanica'', also known as bird cherry, fire cherry, pin cherry, and red cherry, is a North American cherry species in the genus ''Prunus''. Description ''Prunus pensylvanica'' grows as a shrub or small tree, usually with a straight trunk and a narrow, round-topped crown. It grows tall and in diameter. Trees up to tall have been found growing in the southern Appalachians, with the largest found on the western slopes of the Great Smoky Mountains. Its foliage is thin, with leaves long and wide. Flowers occur in small groupings of five to seven with individual flowers across. The fruit are drupes, ranging from , each with a single seed in diameter contained within a hard "stone". Distribution The species is widespread across much of Canada from Newfoundland and southern Labrador to British Columbia and the southern Northwest Territories. Additionally it is very common in New England and the Great Lakes region. It can also be found in the Appalachian Mountain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prunus Maximowiczii
''Prunus maximowiczii'', known as Korean cherry, Korean mountain cherry, or Miyama cherry, is a small (about 7.5 m), fruiting cherry tree that can be found growing wild in northeastern Asia and Eurasia. Taxonomy The species was first described in 1857 by Franz Josef Ruprecht. It was treated in the genus ''Cerasus'' (now generally accepted as a subgenus of ''Prunus'') by Vladimir Leontyevich Komarov in 1927, but the original ''P. maximowiczii'' remains the widely accepted binomial. Description ''P. maximowiczii'' has white, insect-pollinated, hermaphroditic flowers, blooming in May in the Northern Hemisphere, November in the Southern Hemisphere. The edible fruits (cherries) are about 5 mm in diameter, containing one large seed each. They ripen in August in the Northern Hemisphere, February in the Southern Hemisphere. Range and habitat Korea, China (Heilong Jiang, Jilin, Liaoning, and Zhejiang), Russia (Khabarovsk, Primorye, and Sakhalin), and Japan (Hokkaido, Honshu, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
