| abstract |
The present invention relates to heterocyclic derivatives of formula I wherein the variable is as defined in the specification, or relates to a pharmaceutically acceptable salt or solvate thereof. The invention also relates to pharmaceutical compositions comprising said heterocyclic derivatives and their use in therapy, for example in the treatment or prevention of disorders mediated by nicotinic acetylcholine receptors, such as schizophrenia or Alzheimer's disease use. |