| abstract |
Antibacterially active and animal growth promoting novel 1-aryl-4-quinolone-3-carboxylic acids of the formula ##STR1## in which X is halogen or nitro, n X 2 is halogen, n R is optionally substituted phenyl, and n A is halogen or optionally substituted piperazine or pyrrolidine, n or pharmaceutically useable hydrates, acid additions salts, alkali metal, alkaline earth metal, silver or guanidinium salts thereof, and/or esters thereof. |