| abstract |
The present invention relates to therapeutically active piperidine compounds, a method of preparing the same and to pharmaceutical compositions comprising the compounds of formula (I), wherein X is oxygen or sulphur; wherein G is selected from the group of azabicyclic ring systems consisting of (1), (2), or (3) wherein the oxadiazole or thiadiazote ring can be attached at any position. The novel compounds are useful as stimulants of the cognitive function of the forebrain and hippocampus of mammals and especially in the treatment of Alzheimer's disease; severe painful conditions and glaucoma. |