An antibiotic; inhibits PKC, PKA, phosphorylase kinase, EGFR, and c-Src in vitro (IC50s = 9, 26, 5, 200, and 800 nM, respectively); induces cell cycle arrest in the G2/M phase in human leukemia K562 cells (MED = 30 ng/ml); is cytotoxic to doxorubicin-resistant and -susceptible P388 mouse leukemia cells (IC50s = 27 and 45 nM, respectively); inhibits growth of the mycelial, but not yeast form of C. albicans, C. krusei, C. tropicalis, and C. lusitaniae (MICs = 3.1-25 μg/ml)