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Sclarene
Sclarene is a diterpene present in the foliage of ''Podocarpus hallii ''Podocarpus laetus'' is a species of conifer in the family Podocarpaceae, commonly known as Hall's tōtara, mountain tōtara or thin-barked tōtara. Previously known as ''Podocarpus hallii'' and ''Podocarpus cunninghamii'', in 2015 it was re ...''. References Diterpenes Decalins Polyenes Vinylidene compounds {{organic-compound-stub ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diterpene
Diterpenes are a class of chemical compounds composed of four isoprene units, often with the molecular formula C20H32. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway, with geranylgeranyl pyrophosphate being a primary intermediate. Diterpenes form the basis for biologically important compounds such as retinol, retinal, and phytol. They are known to be antimicrobial and antiinflammatory. Structures As with most terpenes a huge number of potential structures exists, which may be broadly divided according to the number of rings present. Biosynthesis Diterpenes are derived from the addition of one IPP unit to FPP to form geranylgeranyl-pyrophosphate (GGPP). From GGPP, structural diversity is achieved mainly by two classes of enzymes; the diterpene synthases and cytochromes P450. Several diterpenes are produced by plants and cyanobacteria. GGPP is also the precursor for the synthesis of the phytane by the action of the enzyme geranylger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diterpenes
Diterpenes are a class of chemical compounds composed of four isoprene units, often with the molecular formula C20H32. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway, with geranylgeranyl pyrophosphate being a primary intermediate. Diterpenes form the basis for biologically important compounds such as retinol, retinal, and phytol. They are known to be antimicrobial and antiinflammatory. Structures As with most terpenes a huge number of potential structures exists, which may be broadly divided according to the number of rings present. Biosynthesis Diterpenes are derived from the addition of one IPP unit to FPP to form geranylgeranyl-pyrophosphate (GGPP). From GGPP, structural diversity is achieved mainly by two classes of enzymes; the diterpene synthases and cytochromes P450. Several diterpenes are produced by plants and cyanobacteria. GGPP is also the precursor for the synthesis of the phytane by the action of the enzyme geranylger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Podocarpus Hallii
''Podocarpus laetus'' is a species of conifer in the family Podocarpaceae, commonly known as Hall's tōtara, mountain tōtara or thin-barked tōtara. Previously known as ''Podocarpus hallii'' and ''Podocarpus cunninghamii'', in 2015 it was realised that the much earlier name ''P. laetus'' has priority. Its common name results from the species being named after J. W. Hall, a New Zealand pharmacist. It is found only in New Zealand. It can be found growing in both montane and subalpine forests but less common in lowland forests. ''P. laetus'' is distinguished from the more widely known lowland tōtara ''Podocarpus totara'' (; from the Maori-language ; the spelling "totara" is also common in English) is a species of podocarp tree endemic to New Zealand. It grows throughout the North Island and northeastern South Island in lowland, montane a ... by its thinner bark, longer juvenile leaves and distribution at higher altitudes. References laetus Trees of New Zealan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyenes
In organic chemistry, polyenes are poly- unsaturated, organic compounds that contain at least three alternating double () and single () carbon–carbon bonds. These carbon–carbon double bonds interact in a process known as conjugation, resulting in some unusual optical properties. Related to polyenes are dienes, where there are only two alternating double and single bonds. The following polyenes are used as antibiotics for humans: amphotericin B, nystatin, candicidin, pimaricin, methyl partricin, and trichomycin. Optical properties Some polyenes are brightly colored, an otherwise rare property for a hydrocarbon. Normally alkenes absorb in the ultraviolet region of a spectrum, but the absorption energy state of polyenes with numerous conjugated double bonds can be lowered such that they enter the visible region of the spectrum, resulting in compounds which are coloured (because they contain a chromophore). Thus many natural dyes contain linear polyenes. Chemical and electri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
