An unprecedented bis-indole 1, a novel indole alkaloid 2, and some known indole-related compounds 3–5 have been isolated from the sponge Plakortis sp. collected from Zampa in Okinawa. Their structures were elucidated by spectroscopic analysis. These metabolites showed cytotoxic activity against P388 leukemia and B16 melanoma cells.
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Acknowledgment
This work was supported in part by Grants-in-Aid for Scientific Research (No. 21221009) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan.
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Published in Khimiya Prirodnykh Soedinenii, No. 6, November–December, 2015, pp. 973–975.
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Hanif, N., Yamada, K., Kitamura, M. et al. New Indole Alkaloids from the Sponge Plakortis sp.. Chem Nat Compd 51, 1130–1133 (2015). https://doi.org/10.1007/s10600-015-1508-0
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DOI: https://doi.org/10.1007/s10600-015-1508-0