| abstract |
The subject matter of the invention are compounds of the formula: <CHEM> wherein R, R1, R2, R3, R4, R5, X and m and n are defined as in the patent claims, and acid additional salts, quaternary ammonium salts and N-oxide derivatives thereof, processes for preparation thereof, and pharmaceutical compositions containing the same. Said compounds, salts and N-oxide derivatives thereof show excellent gastro-intestinal motility enhancing activity. |