abstract |
the present invention relates to compounds that are agonists of the muscarinic receptors m1 and / or m4 and which are useful in the treatment of diseases mediated by muscarinic and m4 receptors. Pharmaceutical compositions containing the compounds and the therapeutic uses of the compounds are also provided. compounds of formula (i) where x1 are provided; x2; r1 and r4 are as defined in the present invention. |