Kumbicin C is a bis-indolyl benzenoid fungal metabolite produced by A. kumbius FRR6049. It inhibits the growth of NS-1 mouse myeloma cells (IC50 = 0.74 μg/ml). Kumbicin C also inhibits the growth of the Gram-positive bacteria B. subtilis (MIC = 1.6 μg/ml).