A phenylpiperazine derivative of formula (I), namely, 8-{4-[3-(5-fluoro-1H-indol-3-yl)-propyl]-piperazin-1-yl}-2-methyl- 4H-benzo[1,4]oxazin-3-one mesylate, useful in treating CNS disorders.
8'4-'3-(5-fluoro-1H-indol-3-YL)propyl!-1-piperazinyl!-2-methyl-2H-1,4-benzoxazin -3(4H)-one methanesulfonate with high affinity for the dopamine D2 receptor and the seotonin reuptake site