| abstract |
Compounds of formula (I): n n nwhere X is N or CH;n A represents a group of formula (a) or (b) n n R 1 represents hydrogen or an —NH 2 , —NR 3 R 4 , —NR 3 CO(C 1 -C 4 )Alk or —NR 3 SO 2 (C 1 -C 4 )Alk group; R 2 represents hydrogen, a halogen or a (C 1 -C 4 )Alk, (C 1 -C 4 )alkoxy, —COOH, —COO(C 1 -C 4 )Alk, —CN, —CONR 3 R 4 , —NO 2 , —SO 2 NR 3 R 4 or —NHSO 2 (C 1 -C 4 )Alk; m and n each represent 0, 1 or 2; R 3 and R 4 each represent hydrogen or a (C 1 -C 4 )Alk group; Y 1 and Y 2 each represent NH or O; and their salts or solvates, a process for their preparation and the pharmaceutical compositions comprising them. |