Abstract
Three new 14-noreudesmane sesquiterpenes (1⿿3) as well as four known ones (4⿿7) were isolated from the leaves of Nicotiana tabacum. Their structures were determined mainly by spectroscopic methods, including extensive 1D- and 2D NMR techniques. Compounds 1⿿7 were evaluated for their anti-tobacco mosaic virus (anti-TMV) activities. The results showed that compound 1 exhibited moderate anti-TMV activity with inhibition rate of 46.7%, which were higher than that of positive control (ningnanmycin).
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