Two new sesquiterpenes, nicosesquites A and B (1 and 2) as well as four known sesquiterpenes (3–6) 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 and 2 were tested for their antimethicillin-resistant Staphylococcus aureus (anti-MRSA) activity. The results revealed that compounds 1 and 2 showed good inhibition with IZD of 13.4 ± 2.2, and 14.6 ± 2.4 mm, respectively. In addition, compounds 1 and 2 also have weak floral fragrances, and they have the potential value for use as an essence for cigarettes.
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Acknowledgment
This project was supported financially by the Foundation of Yunnan Tobacco Company (No. 2021530000241009), the Foundation Yunnan Tobacco Industry Co. Ltd. (No. JB2022XY03), and the Foundation of Yunnan Innovative Research Team (2019HC020).
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Published in Khimiya Prirodnykh Soedinenii, No. 3, May–June, 2023, pp. 421–424.
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Cai, JY., Dai, JM., Xiong, W. et al. Two New Sesquiterpenes from Leaves of Nicotiana tabacum and their Antibacterial Activity. Chem Nat Compd 59, 497–501 (2023). https://doi.org/10.1007/s10600-023-04034-3
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DOI: https://doi.org/10.1007/s10600-023-04034-3