5-fluorobenzonitrile derivatives for increasing the lean meat to fat ratio and/or enhancing the growth rate of warm-blooded animals

摘要

There are provided novel 5-fluorobenzonitrile derivatives which exhibit low beta 1 heart stimulant activity and are useful for increasing the lean meat to fat ratio and/or enhancing the growth rate of warm-blooded animals by, orally or parenterally, administering to said animals an amount of a 5-fluorobenzonitrile derivative or a pharmacologically acceptable salt thereof effective for achieving one or more of the above-identified metabolic improvements in said warm-blooded animals.