Table 4.

Inhibitory activities against DNA topoisomerase IV and DNA gyrase, expressed as IC₅₀ ± SEM (µg/mL).

Compounds	S. aureus Topoisomerase IV	S. aureus DNA Gyrase
6	28.90 ± 0.30	72.60 ± 1.2
Ciprofloxacin	1.70 ± 0.15	3.55 ± 0.13

IC₅₀—half of the maximal inhibitory concentration.