Abstract
From the leaves of Ardisia quinquegona, two alkylated tetronic acid derivatives, named ardisiatetrons A and B (1, 2), and four triterpenoids (3–6) were isolated together with one known compound (7) by a combination of various kinds of chromatography. The structure of new methyl migrated triterpene (3) was confirmed by X-ray crystallographic analysis. Compounds 2, 3, and 7 showed moderate anti-Leishmania activity and cytotoxicity towards A549 cells.
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Acknowledgements
The authors are grateful for access to the mass spectrometer, an Applied Biosystem QSTAR XL system ESI (Nano Spray)-MS at the Analysis Center of Life Science of the Graduate School of Biomedical Sciences, Hiroshima University. This work was supported in part by Grants-in-Aid from the Ministry of Education, Science, Sports, Culture and Technology of Japan, and the Japan Society for the Promotion of Science (Nos. 22590006, 23590130, and 15H04651).
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Kawakami, S., Ishinaka, M., Asaumi, S. et al. Ardisiatetrons A and B: tetronic acid derivatives and triterpenes from the leaves of Ardisia quinquegona and their biological activity. J Nat Med 75, 643–654 (2021). https://doi.org/10.1007/s11418-021-01513-1
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DOI: https://doi.org/10.1007/s11418-021-01513-1