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萜类化合物是天然精油的重要組成部分;与合成香料有着极密切的关系。如从香茅油中分出的香叶醇(Ⅰ)、香草醛(Ⅱ),自山蒼子油中分出的檸檬醛(Ⅲ),薄荷油中的主成分薄荷脑(Ⅳ),芳樟油中的主成分芳樟醇(Ⅴ)以及松节油中的蒎烯(Ⅵ),桔子油中的苧烯(Ⅶ)等都属于这类化合物。为了消楚起見,常用萜烯这个名称指其中只含碳和氫的有关化合物。由于萜烯結构的繁簡又有单萜(C_(10)H_(16))、倍半萜(C_(15)H_(24))、二萜(C_(20)H_(32))以至多萜(C_5H_8)_n之分;到目前为止,在合成
Terpenoids are an essential part of natural essential oils; they have a close relationship with synthetic fragrances. Such as geraniol (I), vanillin (II), citral (III) separated from Litsea cubeba oil, menthol (IV) as the main component in peppermint oil, Linalool (Ⅴ), the main component in camphor oil, pinene (Ⅵ) in turpentine oil and limonene (Ⅶ) in orange oil belong to this class of compounds. For the sake of clarity, the term terpene is commonly used to refer to compounds containing only carbon and hydrogen. Due to the shortening of the terpene structure, monoterpenes (C_ (10) H_ (16)), sesquiterpenes (C_ (15) H_ (24)) and diterpenes (C_ (20) H_ Terpene (C_5H_8) _n points; so far, in the synthesis