Patent ID: 7220769

Claim:
A compound of formula (I) or a salt thereof, or a solvate thereof, wherein; X represents NR b , wherein R b represents hydrogen, unsubstituted or substituted C 1-6 alkyl or unsubstituted or substituted C 1-6 alkylcarbonyl; Y and Z each independently represent, CH, CR 1 or CR 2 ; A represents an unsubstituted or substituted aryl group; R a represents —C(O)NR s R t wherein R s represents substituted aryl, unsubstituted or substituted aryl C 1-6 alkyl, unsubstituted or substituted heterocyclyl or an unsubstituted heterocyclyl C 1-6 alkyl group, R t represents hydrogen, unsubstituted or substituted C 1-6 alkyl, unsubstituted or substituted C 3-8 cycloalkyl, unsubstituted or substituted C 1-6 alkenyl; R 1 and R 2 each independently represents hydrogen, hydroxy, amino, C 1-6 alkoxy, unsubstituted or substituted aryloxy, unsubstituted or substituted benzyloxy, C 1-6 alkylamino, di(C 1-6 alkyl)amino, halo, trifluoromethyl, trifluoromethoxy, nitro, C 1-6 alkyl, carboxy, alkoxycarbonyl, carbamoyl, C 1-6 alkylcarbamoyl, or R 1 and R 2 together represent methylenedioxy, —(CH═CH) 2-3 —, carbonyldioxy or carbonyldiamino.