New Cytotoxic Indolic Metabolites from a Marine Streptomyces
2003
Three new cytotoxic 3,6-disubstituted indoles (1−3) were isolated from the mycelium of a strain identified as Streptomyces sp. (BL-49-58-005), which was separated from a Mexican marine invertebrate, and their structures established by analysis of NMR and mass spectral data. GI50 values for 1 and 2 in cytotoxic bioassays against a panel of 14 different tumor cell lines were estimated at micromolar range, while compound 3 showed no activity in the same assays.
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