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J Nat Prod. 2009 Dec;72(12):2192-4. doi: 10.1021/np9006603.

Tartrolon D, a cytotoxic macrodiolide from the marine-derived actinomycete Streptomyces sp. MDG-04-17-069.

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Medicinal Chemistry and Microbiology Departments, PharmaMar S.A., Pol. Ind. La Mina Norte, Avenida de los Reyes 1, 28770-Colmenar Viejo (Madrid), Spain.


Exploration of marine-derived actinomycetes as a source of antitumor compounds has led to the isolation of a new member of the tartrolon series, tartrolon D (4). This new compound was obtained from Streptomyces sp. MDG-04-17-069 fermentation broths and displayed strong cytotoxic activity against three human tumor cell lines. Additionally, the known compound ikarugamycin (5) was also found in the culture broths of the same microorganism. The structure of this new tartrolon was established by a combination of spectroscopic techniques (1D and 2D NMR, HRMS, and UV) as well as by comparison with published data for similar compounds.

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