A bacterial metabolite; scavenges DPPH radicals in vitro (IC50 = 1.3 μM); reduces TBARS in rat liver microsomes by 72% at 100 μg/ml; is active against B. brevis, B. cereus, M. flavus, and S. aureus (MICs = 50-100 μg/ml); is cytotoxic to P388 and KB lymphocytic leukemia cells (EC50s = 0.022 and 0.3 μg/ml, respectively)