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A series of novel 7‐(3‐aminopyrrolo[3,4‐c]pyrazol‐5(2H,4H,6H)‐yl)‐6‐fluoro‐4‐oxo‐1,4‐dihydroquinoline‐3‐carboxylic acid derivatives was designed, synthesized and characterized by 1H‐NMR, MS and HRMS. These fluoroquinolones were evaluated for their in‐vitro antibacterial activity against representative Gram‐positive and Gram‐negative strains. Generally, all of the target compounds display rather weak...