| 摘要 |
Antibacterially active and animal growth promoting novel 1-aryl-4-quinolone-3-carboxylic acids of the formula <IMAGE> in which X is halogen or nitro, X2 is halogen, R is optionally substituted phenyl, and A is halogen or optionally substituted piperazine or pyrrolidine, or pharmaceutically useable hydrates, acid additions salts, alkali metal, alkaline earth metal, silver or guanidinium salts thereof, and/or esters thereof.
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