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ocimene
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Ocimenes are a group of isomeric hydrocarbons. The ocimenes are monoterpenes found within a variety of plants and fruits. 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. The ocimenes are often found naturally as mixtures of the various forms. The mixture, as well as the pure compounds, are oils with a pleasant odor. They are used in perfumery. Like the related acyclic terpene myrcene, ocimenes are unstable in air.〔Karl-Georg Fahlbusch, Franz-Josef Hammerschmidt, Johannes Panten, Wilhelm Pickenhagen, Dietmar Schatkowski, Kurt Bauer, Dorothea Garbe, Horst Surburg "Flavors and Fragrances" in ''Ullmann's Encyclopedia of Industrial Chemistry'', 2002, Wiley-VCH, Weinheim. 〕 Like other terpenes, the ocimenes are nearly insoluble in water, but soluble in common organic solvents.
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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