| abstract |
The invention relates to heterocyclic compounds of formula (I) having pharmacological activity, processes for their preparation, to compositions containing them and to their use in the treatment of CNS disorders, wherein P represents phenyl, a quinoline or isoquinoline residue, or a 5-membered or 6-membered aromatic heterocylic ring containing up to three heteroatoms selected from nitrogen, oxygen or sulphur; R3 is a group of formula (i) or (ii). |