SUBSTITUTED 1,4-DIHYDRO-4-OXOQUINOLINE-3-CARBOXYLIC ACIDS, PHARMACEUTICAL ACCEPTABLE ESTERS OR SALTS THEREOF, THEIR PREPARATION AND USE

摘要

1-Substituted-6-fluoro-5-methyl-7-(piperazinyl or pyrrolidinyl)-1,4-dihydro-4-oxoquinoline-3-carboxylic acids (I) and processes for preparation thereof. The acids are used for treatment of a bacterial infectious desease. CHEM a