1,8-BRIDGED 4-QUINOLONE-3-CARBOXYLIC ACIDS,A PROCESS FOR THEIR PREPARATION,MEDICAMENTS CONTAINING THESE COMPOUNDS AND THEIR USE FOR THE PREPARATION OF MEDICAMENTS

摘要

As antibacterials and animal growth promoters, the compounds of the formula in which Y is -COOH, -COOR7 or -CONR8, R9, X1 is H, nitro, alkyl or halogen, R10 and R11 preferably complete a piperazine ring, Z is oxygen or NR15, n is 0 or 1, and the others can have various meanings, and pharmaceutically acceptable hydrate, alkali metal, alkaline earth metal, silver or guanidinium salt or ester thereof.