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Combretastatins D-3 and D-4, new macrocyclic lactones from Getonia floribunda.

Chemical investigation of biologically active compounds of Getonia floribunda led to the isolation of two new macrocyclic lactones, combretastatins D-3 (1) and D-4 (2). The structures of these compounds were confirmed by spectroscopic analyses. Combretastatin D-3 (1) exhibited cytotoxicity towards the small-cell lung cancer cell line (NCI-H187, IC50=13.0 +/- 0.2 microg/mL) but was inactive against KB, BC-1, and Vero cell lines. Combretastatin D-3 (1) showed weak antitubercular activity with a minimum inhibitory concentration (MIC) of 100.0 microg/mL, and was inactive towards the malarial parasite. Combretastatin D-4 (2) was inactive in all antitubercular, antiplasmodial, and cytotoxic assays.[1]

References

  1. Combretastatins D-3 and D-4, new macrocyclic lactones from Getonia floribunda. Vongvanich, N., Kittakoop, P., Charoenchai, P., Intamas, S., Danwisetkanjana, K., Thebtaranonth, Y. Planta Med. (2005) [Pubmed]
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