A compound of formula, or a pharmaceutically acceptable salt or solvate thereof: wherein Q represents a group of formula (Qa), (Qb), (Qc), (Qd) or (Qe): in which the asterisk (*) represents the point of attachment to the remainder of the molecule; V represents -CH 2 -, -C(CH 3) 2 -, -CH 2 CH 2 - or -CH 2 CH 2 CH 2 -; W represents the residue of a C 3-7 cycloalkyl group; Y represents -C -, -C N(R 4)- or -C C -; Z represents aryl or heteroaryl, either of which groups may be optionally substituted by one, two or three substituents independently selected from halogen, cyano, nitro, C 1-6 alkyl, trifluoromethyl, cyano(C 1-6)alkyl, (C 3-7)heterocycloalkyl, halo(C 3-7)-heterocycloalkyl, (C 1-6)alkyl(C 3-7)heterocycloalkyl, (C 2-6)alkoxycarbonyl(C 3-7)heterocycloalkyl, dihalo(C 3-7)heterocycloalkyl, (C 3-7)heterocycloalkyl(C 1-6)alkyl, (C 1-6)alkyl-(C 3-7)heterocycloalkyl(C 1-6)alkyl, heteroaryl, hydroxy, oxo, C 1-6 alkoxy, difluoromethoxy, trifluoromethoxy, trifluoroethoxy (C 3-7)heterocycloalkoxy, (C 2-6)alkoxycarbonyl(C 3-7)-heterocycloalkoxy, (C 3-7)heterocycloalkyl(C 1-6)alkoxy, aryloxy, haloaryloxy, (C 1-6)-alkoxyaryloxy, C 1-3 alkylenedioxy, dihalo(C 1-3)alkylenedioxy, arylcarbonyloxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, amino, C 1-6 alkylamino, di(C 1-6)alkylamino, di(C 1-6)alkylamino(C 1-6)alkyl, arylamino, C 2-6 alkylcarbonylamino, C 2-6 alkoxycarbonylamino, C 1-6 alkylsulfonylamino, formyl, C 2-6 alkylcarbonyl, C 3-6 cycloalkylcarbonyl, C 3-6 heterocycloalkylcarbonyl, carboxy, C 2-6 alkoxycarbonyl, aryloxycarbonyl, aminocarbonyl, C 1-6 alkylaminocarbonyl, di(C 1-6)alkylaminocarbonyl, aminosulfonyl, C 1-6 alkylaminosulfonyl and di(C 1-6)alkylaminosulfonyl; A 1 represents C 1-6 alkyl, optionally substituted by -OR a; A 2 represents hydrogen or C 1-6 alkyl; R 4 represents hydrogen or C 1-6 alkyl; R 11 represents hydrogen or amino; R 12 represents hydrogen, trifluoromethyl or C 1-6 alkyl; R 13 represents hydrogen or C 1-6 alkyl; and R a represents hydrogen or C 1-6 alkyl. in which the asterisk (*) represents the point of attachment to the remainder of the molecule; V represents -CH 2 -, -C(CH 3) 2 -, -CH 2 CH 2 - or -CH 2 CH 2 CH 2 -; W represents the residue of a C 3-7 cycloalkyl group; Y represents -C -, -C N(R 4)- or -C C -; Z represents aryl or heteroaryl, either of which groups may be optionally substituted by one, two or three substituents independently selected from halogen, cyano, nitro, C 1-6 alkyl, trifluoromethyl, cyano(C 1-6)alkyl, (C 3-7)heterocycloalkyl, halo(C 3-7)-heterocycloalkyl, (C 1-6)alkyl(C 3-7)heterocycloalkyl, (C 2-6)alkoxycarbonyl(C 3-7)heterocycloalkyl, dihalo(C 3-7)heterocycloalkyl, (C 3-7)heterocycloalkyl(C 1-6)alkyl, (C 1-6)alkyl-(C 3-7)heterocycloalkyl(C 1-6)alkyl, heteroaryl, hydroxy, oxo, C 1-6 alkoxy, difluoromethoxy, trifluoromethoxy, trifluoroethoxy (C 3-7)heterocycloalkoxy, (C 2-6)alkoxycarbonyl(C 3-7)-heterocycloalkoxy, (C 3-7)heterocycloalkyl(C 1-6)alkoxy, aryloxy, haloaryloxy, (C 1-6)-alkoxyaryloxy, C 1-3 alkylenedioxy, dihalo(C 1-3)alkylenedioxy, arylcarbonyloxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, amino, C 1-6 alkylamino, di(C 1-6)alkylamino, di(C 1-6)alkylamino(C 1-6)alkyl, arylamino, C 2-6 alkylcarbonylamino, C 2-6 alkoxycarbonylamino, C 1-6 alkylsulfonylamino, formyl, C 2-6 alkylcarbonyl, C 3-6 cycloalkylcarbonyl, C 3-6 heterocycloalkylcarbonyl, carboxy, C 2-6 alkoxycarbonyl, aryloxycarbonyl, aminocarbonyl, C 1-6 alkylaminocarbonyl, di(C 1-6)alkylaminocarbonyl, aminosulfonyl, C 1-6 alkylaminosulfonyl and di(C 1-6)alkylaminosulfonyl; A 1 represents C 1-6 alkyl, optionally substituted by -OR a; A 2 represents hydrogen or C 1-6 alkyl; R 4 represents hydrogen or C 1-6 alkyl; R 11 represents hydrogen or amino; R 12 represents hydrogen, trifluoromethyl or C 1-6 alkyl; R 13 represents hydrogen or C 1-6 alkyl; and R a represents hydrogen or C 1-6 alkyl.