[关键词]
[摘要]
目的 研究烟草Nicotiana tabacum叶中的西松烷二萜类化学成分。方法 采用柱色谱技术对烟草的95%乙醇提取物进行分离纯化,采用波谱技术结合化学方法进行结构鉴定。结果 从烟草提取物中分离得到了5个西松烷二萜类成分,分别鉴定为(1R,3E,7E,10S,11E)-3,7,11-cem-bratriene-10,15-diols(1)、(1S,2E,4S,6R,7E,10E,12S)-2,7,10-cembratriene-4,6,11-triol(2)、(1S,2E,4R,6R,7E,10E,12S)-2,7,10-cembratriene-4,6,11-triol(3)、(1S,2E,4S,6R,7E)-4,6,11-trihydroxy-1-isopropyl-4,8-dimethylpentadeca-2,7-dien-12-one(4)、(1S,2E,4R,6R,7E,11S,12S)-11,12-epoxy-2,7-cembradiene-4,6-diol(5)。结论 化合物1为1个新化合物,命名为烟叶二萜B;化合物4首次在植物中发现,为1个新的天然产物。
[Key word]
[Abstract]
Objective To study the cembranoid diterpenes from the leaves of Nicotiana tabacum. Methods The cembranoid diterpenes were isolated and purified by silica gel and preparative HPLC, and their structures were elucidated on the basis of their physicochemistry properties and spectra data. Results Five cembranoid diterpenes were obtained from the ethanol extract of the leaves of N. tabacum and identified as (1R,3E,7E,10S,11E)-3,7,11-cembratriene-10,15-diols (1), (1S,2E,4S,6R,7E,10E,12S)-2,7,10-cembratriene-4,6,11-triol (2), (1S,2E,4R,6R,7E,10E,12S)-2,7,10-cembratriene-4,6,11-triol (3), (1S,2E,4S,6R,7E)-4,6,11-trihydroxy-1-isopropyl-4,8-dimethylpentadeca-2,7-dien-12-one (4), and (1S,2E,4R,6R,7E,11S,12S)-11,12-epoxy-2,7-cembradiene-4,6-diol (5). Conclusion Compound 1 is a new cembranoid diterpene and named as nicotiaditerpene B, and compound 4 is a new natural product.
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[基金项目]
烟草基因组重大专项项目:典型香型烟草品质形成的代谢特征研究(902014AA0530)