Formula (1) wherein R represents a halogen atom or a C
1-4
alkyl group; R
1
represents a C
1-4
alkyl group; R
2
represents hydrogen or a C
1-4
alkyl group; R
3
represents hydrogen, or a C
1-4
alkyl group; R
4
represents a trifluorometyl group; R
5
represents hydrogen, a C
1-4
alkyl group or C(0)R
6
;
R
6? represents C
1-4
alkyl, C
3-7
cycloalkyl, NH(C
1-4
alkyl) or N(C1-4alkyl)
2
; m is zero or an integer from 1 to 3; n is an integer from 1 to 3 and pharmaceutically acceptable salts and solvates thereof; to processes for their preparation and their use in the treatment of conditions mediated bytachykinins.