QUINOLINECARBOXYLIC ACID DERIVATIVE OR SALTS THEREOF

摘要

This invention relates to 1-(6-Amino-3,5-difluoropyridin-2- yl)-8-bromo-7-(3-ethylaminoazetidin-1-yl)-6-fluoro-4-oxo-1,4- dihydroquinoline-3-carboxylic acid represented by the formula: <IMG> or a salt thereof, and also to a medicine containing the same. This compound has characteristic features that, when administered orally, it has extremely high blood half-life and bioavailability while retaining properties that is has extremely high antimicrobial effects and has low toxicity. It can be used widely as preventives, therapeutics and the like for various infectious diseases of human and animals.