Aerocavin is an antibiotic that is active against both Gram-positive and Gram-negative bacteria in vitro[1].
References
[1] Singh PD, et al. Aerocavin, a new antibiotic produced by Chromobacterium violaceum. J Antibiot (Tokyo). 1988 Apr;41(4):446-53. DOI:10.7164/antibiotics.41.446