Seventeen novel 2,5-disubstituted benzimidazole derivatives were designed, synthesized and evaluated for their antibacterial activities. The tested compounds B1-B4 and C2-C6 exhibited not only good antifungal activity but also favorable broad-spectrum antibacterial activity. Also, the lowest MIC of antibacterial and antifungal activity was 2 μg/mL and 4 μg/mL, respectively. It suggested that the structure of compound including the different substituent and its sites directly affected the efficacy of the synthesized compounds.
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