Therapeutic use of

1. A method of treating a disease selected from the group consisting of bladder hyperactivity, bladder hyperreflexia, bladder instability, incontinence, urgent urination, urinary incontinence, cystitis, renal colic, pelvic hypersensitivity, pelvic pain, asthma and cough, comprising administering to a patient in need of said treatment a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof:

in which

X 1 , X 2 , X 3 , X 4 , Z 1 , Z 2 , Z 3 , Z 4 and Z 5 represent, independently of one another, a hydrogen or halogen atom or a C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, C 1 -C 6 fluoroalkyl, C 1 -C 6 alkoxy, C 1 -C 6 fluoroalkoxy, cyano, C(O)NR 1 R 2 , nitro, NR 1 R 2 , C 1 -C 6 thioalkyl, —S(O)—(C 1 -C 6 ) alkyl, —S(O) 2 —(C 1 -C 6 )alkyl, SO 2 NR 1 R 2 , NR 3 COR 4 , NR 3 SO 2 R 5 or aryl group;

X 5 represents a hydrogen or halogen atom or a C 1 -C 6 alkyl or C 1 -C 6 fluoroalkyl group;

R represents a 4-, 5-, 6- or 7-indolyl group,

R optionally being substituted in the 1, 2 or 3 position by one or more groups chosen from the C 1 -C 6 alkyl and C 1 -C 6 fluoroalkyl groups;

R optionally being substituted in the 4, 5, 6 or 7 position by one or more groups chosen from halogen atoms or C 1 -C 6 alkyl, C 1 -C 6 fluoroalkyl, C 1 -C 6 alkoxy or C 1 -C 6 fluoroalkoxy groups;

Y represents a hydrogen atom or a C 1 -C 6 alkyl group;

n is equal to 0, 1, 2 or 3;

R 1 and R 2 represent, independently of one another, a hydrogen atom or a C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, (C 3 -C 7 )cycloalkyl(C 1 -C 3 )alkyl or aryl group; or

R 1 and R 2 form, together with the nitrogen atom which carries them, an azetidine, pyrrolidine, piperidine, azepine, morpholine, thiomorpholine, piperazine or homopiperazine group, said group optionally being substituted by a C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, (C 3 -C 7 )cycloalkyl(C 1 -C 3 )alkyl or aryl group;

R 3 and R 4 represent, independently of one another, a hydrogen atom or a C 1 -C 6 alkyl or aryl group; and

R 5 represents a C 1 -C 6 alkyl or aryl group.

2. The method according to claim 1 , wherein the compound of formula (I) is having:

X 1 , X 2 , X 3 , X 4 , Z 1 , Z 2 , Z 3 , Z 4 and Z 5 represent, independently of one another, a hydrogen or halogen atom or a C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, C 1 -C 6 fluoroalkyl, C 1 -C 6 alkoxy, C 1 -C 6 fluoroalkoxy, nitro, NR 1 R 2 , C 1 -C 6 thioalkyl, —S(O)—(C 1 -C 6 ) alkyl, —S(O) 2 —(C 1 -C 6 ) alkyl or aryl group;

X 5 represents a hydrogen atom or a C 1 -C 6 alkyl group;

R represents a 4-, 5-, 6- or 7-indolyl group,

R optionally being substituted in the 1, 2 or 3 position by one or more C 1 -C 6 alkyl groups;

Y represents a hydrogen atom;

n is equal to 0, 1, 2 or 3; and

R 1 and R 2 represent, independently of one another, a hydrogen atom.

3. The method according to claim 1 , wherein the compound of formula (I) is having:

R represents an indol-5-yl group

R optionally being substituted in the 1, 2 or 3 position by one or more groups chosen from C 1 -C 6 alkyl and C 1 -C 6 fluoroalkyl groups; and

R optionally being substituted in the 4, 6 or 7 position by one or more groups chosen from halogen atoms or C 1 -C 6 alkyl, C 1 -C 6 fluoroalkyl, C 1 -C 6 alkoxy or C 1 -C 6 fluoroalkoxy groups.

4. The method according to claim 1 , wherein X 2 or X 3 is other than a hydrogen atom.

5. The method according to claim 1 , wherein X 5 represents a hydrogen atom.

6. The method according to claim 1 , wherein Y represents a hydrogen atom.

7. The method according to claim 1 , wherein the disease is bladder hyperactivity.

8. The method according to claim 1 , wherein the disease is bladder hyperreflexia.

9. The method according to claim 1 , wherein the disease is bladder instability.

10. The method according to claim 1 , wherein the disease is incontinence.

11. The method according to claim 1 , wherein the disease is urgent urination.

12. The method according to claim 1 , wherein the disease is urinary incontinence.

13. The method according to claim 1 , wherein the disease is cystitis.

14. The method according to claim 1 , wherein the disease is renal colic.

15. The method according to claim 1 , wherein the disease is pelvic hypersensitivity.

16. The method according to claim 1 , wherein the disease is pelvic pain.

17. The method according to claim 1 , wherein the disease is asthma.

18. The method according to claim 1 , wherein the disease is cough.