| abstract |
The present invention relates to a novel phenylpiperazine derivative of formula (I).n n n Formula 1n n n n n n n n In the above formula,n n n R represents group (a) or (b) as set forth in the specification.n n n These compounds are (partial) D2 receptor agonists and are useful for treating central nervous system (CNS) disorders, particularly Parkinson's disease. |