Zelkovamycin is a cyclic peptide antibiotic originally isolated from Streptomyces.1 It inhibits growth of X. oryzae, P. oryzae, S. aureus, and A. laidlawii in a concentration-dependent manner when used at concentrations ranging from 0.01 to 300 μg/ml.
References
1. Zhang, H., Tomoda, H., Tabata, N., et al. Zelkovamycin, a new cyclic peptide antibiotic from Streptomyces sp. K96-0670. I. Production, isolation and biological properties. J. Antibiot. (Tokyo) 52(1), 29-33 (1999).