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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] |
Cucurbitacin
Cucurbitacins are a class of biochemistry, biochemical compounds that some plants – notably members of the pumpkin and gourd family, Cucurbitaceae – produce and which function as a defense against herbivores. Cucurbitacins and their derivative (chemistry), derivatives have also been found in many other plant families (including Brassicaceae, Scrophulariaceae, Begoniaceae, Elaeocarpaceae, Datiscaceae, Desfontainiaceae, Polemoniaceae, Primulaceae, Rubiaceae, Sterculiaceae, Rosaceae, and Thymelaeaceae), in some mushrooms (including ''Russula'' and ''Hebeloma'') and even in some marine mollusks. Cucurbitacins may be a taste deterrent in plants foraged by some animals and in some edible plants preferred by humans, such as cucumbers and zucchinis. In basic research, laboratory research, cucurbitacins have cytotoxic properties and are under study for their potential biological activity. Cucurbitacins are chemically classified as triterpenes, formally derived from cucurbitane, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cucurbitane
Cucurbitane is a tetracyclic chemical compound with formula . It is a polycyclic hydrocarbon, specifically triterpene. It is also an isomer of lanostane (specifically 19(10→9β)-abeolanostane), from which it differs by the formal shift of a methyl group (carbon number 19) from the 10 to the 9β position in the standard steroid numbering scheme.Satish Kumar and Raj Kumar (1991), ''Dictionary of Biochemistry''. Anmol Publications, India The name is applied to two stereoisomers, distinguished by the prefixes 5α- and 5β-, which differ by the handedness of the bonds at a particular carbon atom (number 5 in the standard steroid numbering scheme). File:5alpha-cucurbitane.svg, 5α-Cucurbitane File:5beta-cucurbitane.svg, 5β-Cucurbitane Cucurbitane is the core chemical structure of a class of derivatives known as cucurbitane-type triterpenoids or simply as cucurbitanes. Derivatives Natural compounds Compounds with the basic cucurbitane skeleton are found in many plants, an ... [...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 or new bonds formed or both. 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, usin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichosanthes Tricuspidata
''Trichosanthes tricuspidata'' is a climbing plant in the family Cucurbitaceae. Subspecies The following subspecies are listed in the Catalogue of Life: * ''T. t. asperifolia'' * ''T. t. seramensis'' * ''T. t. siberutensis'' * ''T. t. javanica'' * ''T. t. rotundata'' * ''T. t. tricuspidata'' * ''T. t. flavofila'' * ''T. t. strigosa'' * ''T. t. tomentosa'' Gallery Trichosanthes tricuspidata Blanco2.460.jpg File:Trichosanthes tricuspidata var. tomentosa 8.JPG, ''T. tricuspidata'' var. ''tomentosa'' (near Mananthavady Mananthavady is the Grade 3 municipality in the Wayanad district of Kerala, India. The municipal boundaries are defined by Tirunelli Panchayat to the north, Kabani River to the east and south, and Thavinhal Panchayat to the west. Mananthavady i ..., India) References Loureiro, João de (1790) ''Flora Cochinchinensis'' 2: 589. External links * * {{Taxonbar, from=Q10865852 tricuspidata Flora of tropical Asia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triterpene
Triterpenes are a class of terpenes composed of six isoprene units with the molecular formula C30H48; they may also be thought of as consisting of three terpene units. Animals, plants and fungi all produce triterpenes, including squalene, the precursor to all steroids. Structures Triterpenes exist in a great variety of structures. Nearly 200 different skeletons have been identified. These skeletons may be broadly divided according to the number of rings present. In general pentacyclic structures (5 rings) tend to dominate. Squalene is biosynthesized through the head-to-head condensation of two farnesyl pyrophosphate units. This coupling converts a pair of C15 components into a C30 product. Squalene serves as precursor for the formation of many triterpenoids, including bacterial hopanoids and eukaryotic sterols. Triterpenoids By definition triterpenoids are triterpenes that possess heteroatoms, usually oxygen. The terms ''triterpene'' and ''triterpenoid'' often are used i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrocarbon
In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colourless and Hydrophobe, hydrophobic; their odor is usually faint, and may be similar to that of gasoline or Naphtha, lighter fluid. They occur in a diverse range of molecular structures and phases: they can be gases (such as methane and propane), liquids (such as hexane and benzene), low melting solids (such as paraffin wax and naphthalene) or polymers (such as polyethylene and polystyrene). In the fossil fuel industries, ''hydrocarbon'' refers to naturally occurring petroleum, natural gas and coal, or their hydrocarbon derivatives and purified forms. Combustion of hydrocarbons is the main source of the world's energy. Petroleum is the dominant raw-material source for organic commodity chemicals such as solvents and polymers. Most anthropogenic (human-generated) emissions of greenhouse gases are eithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
