Abstract
The cytotoxic potential and structure activity relationships of several indole metabolites obtained from feeding experiments using Streptomyces staurosporeus, a staurosporine producer, are described. 6-Fluoro-tryptamine and N b -acetyl-tryptamine-5- O -a-L-rhamnopyranoside, a metabolite obtained from the feeding experiment, demonstrated greatest activity with KB cells in culture, by means of an unknown mechanism.