Further Minor Metabolites of Staurosporine Produced by a Streptomyces longisporoflavus Strain
1996
From the Staurosporine producing strain R-19 Streptomyces longisporoflavus various minor metabolites were isolated: They include new compounds with a keto function at carbon 4' of Staurosporine and several metabolites related to TAN-1030A. The new structures were elucidated by spectroscopic methods, mainly 1H NMR and 13C NMR and by comparison with TAN-1030A. The new compounds inhibited protein kinase C with IC50 values in the micromolar range with the exception of those compounds that are alkylated at the lactam nitrogen.
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