Anti-tuberculosis activity and structure–activity relationships of oxygenated tricyclic carbazole alkaloids and synthetic derivatives
2017
Abstract A series of 49 oxygenated tricyclic carbazole derivatives has been tested for inhibition of the growth of Mycobacterium tuberculosis and a mammalian cell line (vero cells). From this series, twelve carbazoles showed a significant anti-TB activity. The four most active compounds were the naturally occurring carbazole alkaloids clauszoline-M ( 45 ), murrayaline-C ( 41 ), carbalexin-C ( 27 ), and the synthetic carbazole derivative 22 with MIC 90 values ranging from 1.5 to 3.7 μM. The active compounds were virtually nontoxic for the mammalian cell line in the concentration range up to 50 μM.
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