| abstract |
Compounds of formula (I): wherein A is a (hetero) aromatic or non- (hetero) aromatic ring containing 5, 6 or 7 ring members and Z 1 , Z 2 and Z 3 are independent of each other A CH group or a nitrogen atom, at least one of these three groups is a nitrogen atom, X is an alkylene chain as defined herein, and R 2 is an aryl or heteroaryl group Yes, R 1 is a group of formula (II) as defined in the specification. |