1371629-36-5

GC-072 (GC072) is a potent, 4-oxoquinolizine antibiotic with selective inhibitory activity against bacterial topoisomerases (E. coli Topo II/DNA gyrase, IC50=0.18-1.5 uM).GC-072 demonstrated no detectable inhibition of human Topo I and II, is selective for bacterial topoisomerases (IC50>100 uM).GC-072 inhibits E. coli Quinolone-resistant gyrase (IC50=1.3-1.5 uM), S. aureus Gyrase and Topo IV (IC50=2-30 uM).GC-072 demonstrated good activity against B. pseudomallei, with an MIC90 of 0.25 ug/mL.GC-072 exhibited strong in vitro antimicrobial potency against biothreat agents Bacillus anthracis, Yersinia pestis, and Francisella tularensis and category B biothreat agent Burkholderia mallei.GC-072 is efficacious against B. pseudomallei aerosol infection in a mouse model following exposure to a 24-LD50 bacterial challenge.