| abstract |
PROBLEM TO BE SOLVED: To provide a novel pyridonecarboxylic acid derivative or a salt thereof having excellent antibacterial activity and oral absorbability and an antibacterial agent containing the same. SOLUTION: 1- (6-amino-3,5-difluoropyridin-2-yl) -8-chloro-6-fluoro-7 -(3-hydroxyazetidin-1-yl) -4-oxo-1,4-dihydroquinoline-3-carboxylic acid or a salt thereof, and an antibacterial agent containing the substance as an active ingredient. |