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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 ''Hemsleya'' is a genus of flowering plants belonging to the family Cucurbitaceae. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endecaphyllacin A
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 ''Hemsleya'' is a genus of flowering plants belonging to the family Cucurbitaceae. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endecaphyllacin B
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 ''Hemsleya'' is a genus of flowering plants belonging to the family Cucurbitaceae. I ... [...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 (; Indonesian: ''Kepulauan Maluku'') or the Moluccas () are an archipelago in the east of Indonesia. Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located ..., 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. Knowns species According to Kew: *'' Hemsleya amabilis'' *'' Hemsleya carnosiflora'' *'' Hemsleya chengyihana'' *'' Hemsleya chinensis'' *'' Hemsleya cirromitrata'' *'' Hemsleya delavayi'' *'' Hemsley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methanol
Methanol (also called methyl alcohol and wood spirit, amongst other names) is an organic chemical and the simplest aliphatic alcohol, with the formula C H3 O H (a methyl group linked to a hydroxyl group, often abbreviated as MeOH). It is a light, volatile, colourless, flammable liquid with a distinctive alcoholic odour similar to that of ethanol (potable alcohol). A polar solvent, methanol acquired the name wood alcohol because it was once produced chiefly by the 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 to other commodity chemicals, including formaldehyde, acetic acid, methyl tert-butyl ether, methyl benzoate, anisole, peroxyacids, as well as a host of more specialised chemicals. Occurrence Small amounts of methanol are present in normal, healthy ... [...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 Cucurbitane is a class of chemical compounds with formula ( CAS number 65441-59-0). It is a polycyclic hydrocarbon, specifically triterpene. It is also an isomer of lanostane (specifically 19(10→9β)-abeolanostane), from which it differs by ... (), 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 from the fruits of ''T. tricuspidata'' References Triterpene glycosi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuber
Tubers are a type of enlarged structure used as storage organs for nutrients in some plants. They are used for the plant's perennation (survival of the winter or dry months), to provide energy and nutrients for regrowth during the next growing season, and as a means of asexual reproduction. ''Stem tubers'' form thickened rhizomes (underground stems) or stolons (horizontal connections between organisms); well known species with stem tubers include the potato and yam. Some writers also treat modified lateral roots (''root tubers'') under the definition; these are found in sweet potatoes, cassava, and dahlias. Terminology The term originates from the Latin , meaning "lump, bump, swelling". Some writers define the term "tuber" to mean only structures derived from stems; others use the term for structures derived from stems or 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 typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triketones
In organic chemistry, a triketone or trione is an organic compound containing three ketone () 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 In organic chemistry, a dicarbonyl is a molecule containing two carbonyl () groups. Although this term could refer to any organic compound containing two carbonyl groups, it is used more specifically to describe molecules in which both carbonyls ... References External links *{{Commonscatinline, Trik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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