Table 2.
Derivatives with di-substituted B-ring.
| ||||||
|---|---|---|---|---|---|---|
| Compound |
IC50[a] (nM) | MIC[b] (μg/mL) | Ki (nM) | |||
| R1 | R2 | R3 | ||||
| PT004 | -H | -H | -H | 11 ± 1[c] | 2.1 ± 0.9 | 9.4 ± 0.5 |
| PT070 | -CH3 | -H | -H | 50.7 ± 4 | 3.125 | 0.044 ± 0.005 |
| PT107 | -CH3 | -H | -NO2 | 50±5 | 6.25 | 0.13 ± 0.03 |
| PT108 | -CH3 | -CH3 | -H | 1570 ± 200 | 100 | N.D.[e] |
| PT109 | -Cl | -Cl | -H | 86 ± 6 | 25 | N.D.[e] |
| PT110 | -CH3 | -NH2 | -H | N.I.[d] | >100 | N.D.[e] |
| PT111 | -F | -CN | -H | 100±9 | 25 | N.D.[e] |
| PT131 | -C(NH)NH2 | -F | -H | N.I.[d] | N.D.[e] | N.D.[e] |
| PT133 | -F | -Cl | -H | 79.7 ± 24.4 | 25 | N.D.[e] |
[a]
The half maximal inhibitory concentration (IC50) is the concentration of an inhibitor that is required for inhibition of 50% of the enzyme activity.
[b]
The minimum inhibitory concentration (MIC) is the lowest concentration of an inhibitor that is adequate to inhibit visible growth of bacteria.
[c]
IC50 values were determined at an enzyme concentration of 1 nm.
[d]
N.I. = No inhibition observed at 2000 nm.
[e]
N.D. = Not determined.
IC50 and Ki values are average results from 3 independent experiments with standard deviation.