Antibacterial agent 266 (Compound C5) is a plant pathogen inhibitor that disrupts bacterial integrity, with EC50 values of 24.1 μg/mL and 39.0 μg/mL against Xanthomonas oryzae pv oryzae (Xoo) and X. axonopodis pv citri (Xac), respectively. Antibacterial agent 266 can be used in the development of plant pathology and agricultural antimicrobial agents research[1].