An antibiotic; active against bacteria (MICs = 300 and 200 μg/ml for S. aureus and B. subtilis, respectively) and fungi; prevents germination of B. allii, P. gladioli, S. atra, and M. mucedo when used at a concentration of 2.5 μg/ml and A. glauca and A. niger at concentrations of 25-50 μg/ml; inhibits nucleic acid and protein synthesis in S. carlsbergensis