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Endecaphyllacin
Endecaphyllacin is either of two similar compounds found in certain plants, such as '' Hemsleya endecaphylla''.Jian-Chao Chen, Gao-Hong Zhang, Zhong-Quan Zhang, Ming-Hua Qiu, Yong-Tang Zheng, Liu-Meng Yang, Kai-Bei Yu (2008), "Octanorcucurbitane and Cucurbitane Triterpenoids from the Tubers of ''Hemsleya endecaphylla'' with HIV-1 Inhibitory Activity". ''J. Nat. Prod.'' volume 71, pages 153–155 * Endecaphyllacin A, 2β-hydroxy-20,21,22,23,24,25,26,27-octanorcucurbita-5-ene-3,11,16-trione, . Crystallizes with 1 molecule of methanol as colorless prisms, mp 207-209 °C; * Endecaphyllacin B, 2-hydroxy-20,21,22,23,24,25,26,27-octanorcucurbita-1,5-dien-3,11,16-trione, . It is the aglycon of khekadaengoside L from ''Trichosanthes tricuspidata''. Crystallizes from methanol as colorless prisms, mp 229-231 °C Endecaphyllacins A and B can be extracted from the dried tubers of '' Hemsleya endecaphylla'' with methanol Methanol (also called methyl alcohol and wood spirit, amongst ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemsleya Endecaphylla
''Hemsleya'' is a genus of flowering plants belonging to the family Cucurbitaceae. Its native range is Eastern Himalayas to southern China and Papuasia. It is native to the countries of Assam (in India), Bismarck Archipelago (island group, part of Papua New Guinea), China, East Himalayas, Maluku Islands The Maluku Islands ( ; , ) or the Moluccas ( ; ) are an archipelago in the eastern part of Indonesia. Tectonics, Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located in West ..., New Guinea, Thailand and Vietnam. The genus name of ''Hemsleya'' is in honour of William Hemsley (1843–1924), an English botanist. It was first described and published in J. Linn. Soc., Bot. Vol.23 on page 490 in 1888. Known species According to Kew: *'' Hemsleya amabilis'' *'' Hemsleya carnosiflora'' *'' Hemsleya chengyihana'' *'' Hemsleya chinensis'' *'' Hemsleya cirromitrata'' *'' Hemsleya delavayi'' *'' Hemsleya ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methanol
Methanol (also called methyl alcohol and wood spirit, amongst other names) is an organic chemical compound and the simplest aliphatic Alcohol (chemistry), alcohol, with the chemical formula (a methyl group linked to a hydroxyl group, often abbreviated as MeOH). It is a light, Volatility (chemistry), volatile, colorless and flammable liquid with a distinctive alcoholic odor similar to that of ethanol (potable alcohol), but is more acutely toxic than the latter. Methanol acquired the name wood alcohol because it was once produced through destructive distillation of wood. Today, methanol is mainly produced industrially by hydrogenation of carbon monoxide. Methanol consists of a methyl group linked to a polar hydroxyl group. With more than 20 million tons produced annually, it is used as a Precursor (chemistry), precursor to other commodity chemicals, including formaldehyde, acetic acid, methyl tert-butyl ether, methyl ''tert''-butyl ether, methyl benzoate, anisole, peroxyacids, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khekadaengoside
Khekadaengoside is any one of several chemical compounds isolated from certain plants, notably ''Trichosanthes tricuspidata''. They can be seen as derivatives of the triterpene hydrocarbon cucurbitane (), more specifically from cucurbitacins H and L.Jian Chao Chen, Ming Hua Chiu, Rui Lin Nie, Geoffrey A. Cordell and Samuel X. Qiu (2005), "Cucurbitacins and cucurbitane glycosides: structures and biological activities" ''Natural Product Reports'', volume 22, pages 386-399 They include: * Khekadaengoside A from ''T. tricuspidata'' * Khekadaengoside B from ''T. tricuspidata'' * Khekadaengoside D from the fruits of ''T. tricuspidata'' * Khekadaengoside K Khekadaengoside is any one of several chemical compounds isolated from certain plants, notably ''Trichosanthes tricuspidata''. They can be seen as derivatives of the triterpene hydrocarbon cucurbitane (), more specifically from cucurbitacins H and ... from the fruits of ''T. tricuspidata'' References Triterpene glycosides< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuber
Tubers are a type of enlarged structure that plants use as storage organs for nutrients, derived from stems or roots. Tubers help plants perennate (survive winter or dry months), provide energy and nutrients, and are a means of asexual reproduction. Stem tubers manifest as thickened rhizomes (underground stems) or stolons (horizontal connections between organisms); examples include the potato and Yam (vegetable), yam. The term ''root tuber'' describes modified lateral roots, as in sweet potatoes, cassava, and dahlias. Terminology The term originates from the Latin , meaning 'lump, bump, or swelling'. Some writers limit the definition of ''tuber'' to structures derived from Plant stem, stems, while others also apply the term to structures derived from roots., p. 124 Stem tubers A stem tuber forms from thickened rhizomes or stolons. The top sides of the tuber produce shoots that grow into typical stems and leaves and the undersides produce roots. They tend to form at the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triketones
In organic chemistry, a triketone or trione is an organic compound containing three ketone () functional group, groups. The simplest triketones, such as cyclopropanetrione and 2,3,4-pentanetrione, are only of occasional theoretical interest. More pertinent are triacetylmethane and 2,4,6-heptanetrione. Both species exist predominantly in the enol () forms. Image:Croconic_acid.svg, Croconic acid Image:Ac3CH.svg, Triacetylmethane Image:2,4,6-heptanetrione.svg, 2,4,6-Heptanetrione Occurrence and significance Tri- and polyketones are of practical importance as intermediates in the biosynthesis of polyketides. These natural products are a major source of antibiotics. See also * Diketone References External links *{{Commonscatinline, Triketones Triketones, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
