Table 2. Evaluation of the Inhibitory Activities of the Selected Thiazolo-quinazolines 4 and 5, in Comparison with Ciprofloxacin, Against S. aureus DNA Gyrasea.
| IC50(μM) (mean ± SEM) | |
|---|---|
| Compd. No. | S. aureusDNA gyrase supercoiling |
| 4 | 11.72 ± 0.47 |
| 5 | 7.13 ± 0.28 |
| Ciprofloxacin | 19.3 ± 0.73 |
IC50: The compound concentration required to inhibit 50% of the enzyme activity, represented by the standard error of the mean (SEM). Each value corresponds to the average of three readings.