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. 2020 Oct 15;11(12):2433–2440. doi: 10.1021/acsmedchemlett.0c00416

Table 1. Inhibitory Activity of Series I of Compounds with Benzimidazole Central Scaffold.

graphic file with name ml0c00416_0005.jpg

      IC50 (μM) or RA (%)a
Cmpd n R E. coli gyrase E. coli topo IV S. aureus gyrase S. aureus topo IV
4a 0 Et 4.0 ± 1.6 μM 100% 100% 100%
4b 1 Me 7.0 ± 3.4 μM 100% 100% 100%
5a 0 H 0.60 ± 0.32 μM 12 ± 2 μM 80 ± 23 μM 31 ± 1 μM
5b 1 H 1.5 ± 0.2 μM 100% 100% 100%
1     0.058 μM 13 μM >100 μM 10 μM
novobiocin     0.17 μM 11 μM 0.041 μM 27 μM
a

Residual activity of the enzyme at 10 μM concentration of the compound.