Antibacterial agent 143

Compound 5a (Antibacterial agent 143) is a small-molecule antibacterial agent effective against both Gram-positive and Gram-negative bacteria, including B. subtilis, S. aureus, P. aeruginosa, and E. coli, with MIC values ranging from 25 to 50 μg/mL. It is a useful research tool for in vitro studies of antimicrobial mechanisms and bacterial growth inhibition.