A mycotoxin with broad spectrum antibiotic activity against Gram positive and Gram negative bacteria; acted synergistically at 4-16 mg/L in vitro with erythromycin (500-2,000 mg/L) against multi-drug resistant strains of S. aureus; reduced tumor growth and prolonged survival synergistically with cyclophosphamide (20 mg/kg/d) in a mouse model of sarcoma