A new sesquiterpene, oxymethyl)-8-methyltricyclo[4.4.0.0(2,8)]dec-4-en
e (1), was isolated and identified from the leaf surface lipids of Nic
otiana umbratica Burbidge. The structure of compound 1, including the
absolute stereochemistry, was established on the basis of its spectral
data and X-ray diffraction analysis of 15-p-bromobenzoate (1a). (C) 1
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