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α-Ocimene and the two β-ocimenes differ in the position of the isolated double bond: it is terminal in the alpha isomer. α-Ocimene is cis-3,7-dimethyl-1,3,7-octatriene. β-Ocimene is trans-3,7-dimethyl-1,3,6-octatriene. β-Ocimene exists in two stereoisomeric forms, cis and trans, with respect to the central double bond.
For example, camphor, citral, citronellol, geraniol, grapefruit mercaptan, eucalyptol, ocimene, myrcene, limonene, linalool, menthol, camphene and pinenes are used in perfumes and cosmetic products. Limonene and perillyl alcohol are used in cleaning products. [13] [14]
geranyl diphosphate (E)-β-ocimene + diphosphate This enzyme is widely distributed in plants , which release β-ocimene when attacked by herbivorous insects . References
In addition to o-cymene, there are two other geometric isomers called m-cymene, in which the alkyl groups are meta-substituted, and p-cymene, in which they are para-substituted.
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In addition to p-cymene, two less common geometric isomers are o-cymene, in which the alkyl groups are ortho-substituted, and m-cymene, in which they are meta-substituted.
The osmetrial secretion consists of a mixture of volatile organic acids, such as isobutyric acid and 2-methylbutyric acid. [4]The secretion of Papilio demodocus pre-final larval instar contains methyl 3-hydroxybutanoate, 3-hydroxybutanoic acid, α-pinene, myrcene, limonene, β-phellandrene, ()-ocimene, (E)-ocimene, β-caryophyllene, ()-β-farnesene, and germacrene A, as well as a number of ...
Terpenoids are modified terpenes, [7] wherein methyl groups have been moved or removed, or oxygen atoms added. Some authors use the term "terpene" more broadly, to include the terpenoids.