Substituted arylpyrazoles

1. A combination product comprising a compound of formula (I):

wherein:

R 1 is CF 3 , OCF 2 H, OCF 3 , —SCF 3 , —SOCF 3 , —SO 2 CF 3 , or SF 5 ;

R 2 is CF 3 ;

R 3 and R 4 each independently represent H, C 1-4 alkyl optionally substituted by 1 to 5 halogen groups independently selected from chloro and fluoro, or a chloro or fluoro;

R 5 and R 6 each independently represent chloro or fluoro;

R 7 is Cl or fluoro;

X is CR 8 where R 8 is Cl or fluoro; and

R 9 is NH 2 ;

or a pharmaceutically acceptable salt thereof;

with the proviso that at least one of R 3 , R 4 , R 5 , or R 6 is fluoro, with one or more other therapeutic agents.

2. A combination claim 1 , wherein R 1 is CF 3 or SF 5 .

3. A combination of claim 2 , wherein R 3 and R 4 both represent fluoro and R 5 and R 6 represent hydrogen.

4. A combination of claim 3 , wherein R 7 and R 8 are both chloro.

5. A combination as claimed in claim 1 where the compound of formula (I) is selected from:

5-amino-1-[2,6-dichloro-4-pentafluorothiophenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4[2,2-difluoro-1-(trifluoromethyl)cyclopropl]-1H-pyrazole-3-carbonitrile;

5-amino-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1-[2,6-difluoro-4-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[2,2,3,3-tetrafluoro-1-(trifluorornethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile,

5-amino-1-[2,6-dichloro-4-(trifluoromethoxy)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1-{2,6-dichloro-4-[(triftuoromethyl)thio]phenyl}-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

5-amino-1{2,6-dichloro-4-[(trifluoromethyl)sulfonyl]phenyl}-4[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile; and

5-amino-1[2,6-dichloro-4-(difluoromethoxy)phenyl]-4-[2,2-difluoro-1-(trifluoromethyl)cyclopropyl]-1H-pyrazole-3-carbonitrile;

or a pharmaceutically acceptable salt thereof.

6. A combination of claim 1 where the combination comprises a compound of formula (I), or a pharmaceutically acceptable salt thereof, and one or more other therapeutic agents wherein said therapeutic agents are anti-parasitic agents.

7. A combination of claim 6 where the one or more other anti-parasitic agents are selected from ivermectin, avermectin, abamectin, emamectin, eprinomectin, doramectin, selamectin, moxidectin, nemadectin, albendazole, cambendazole, fenbendazole, flubendazole, mebendazole, oxfendazole, oxibendazole, parbendazole, tetramisole, levamisole, pyrantel pamoate, oxantel, morantel, triclabendazole, praziquantel, epsiprantel, fipronil, lufenuron, ecdysone, tebufenozide and imidacloprid.

8. A combination product of a compound of formula (I) of claim 1 , or a pharmaceutically acceptable salt thereof, for use in the manufacture of a medicament, in combination with one or more further antiparasitic agents for the treatment of parasitic infections.

9. A pharmaceutical composition comprising a compound of claim 1 , or a pharmaceutically acceptable salt thereof, one or more further therapeutic agents, and a pharmaceutically suitable excipient.