the N-oxide forms, the pharmaceutically acceptable addition salts and the stereochemically isomeric forms thereof, wherein X represents C or N; Y represents C or N; L represents a methyl or a direct bond; Z.sup.1 represents a direct bond, C.sub.1-2alkyl- or a divalent radical of formula --CH.sub.2--CH.dbd. (a) or --CH.dbd. (b); Z.sup.2 represents a direct bond, C.sub.1-2alkyl- or a divalent radical of formula --CH.sub.2--CH.dbd. (a) or --CH.dbd. (b); R.sup.1 represents hydrogen, halo, cyano, amino, phenyl, hydroxy, C.sub.1-4alkyloxycarbonyl, hydroxycarbonyl, NR.sup.3R.sup.4 or C.sub.1-4alkyl optionally substituted with one or more substituents selected from hydroxycarbonyl, phenyl, C.sub.1-4alkyloxy or NR.sup.5R.sup.6 or R.sup.1 represents C.sub.1-4alkyloxy- optionally substituted with one or more substituents selected from hydroxycarbonyl, phenyl, C.sub.1-4alkyloxy or NR.sup.7R.sup.8; R.sup.2 represents hydrogen, halo, C.sub.1-4alkyl or C.sub.1-4alkyloxy-; R.sup.3 and R.sup.4 each independently represent hydrogen, C.sub.1-4alkyl or C.sub.1-4alkylcarbonyl-; R.sup.5 and R.sup.6 each independently represent hydrogen, C.sub.1-4alkyl or C.sub.1-4alkylcarbonyl-; R.sup.7 and R.sup.8 each independently represent hydrogen, C.sub.1-4alkyl or C.sub.1-4alkylcarbonyl-; A represents phenyl or a monocyclic heterocycle selected from the group consisting of thiophenyl, furanyl, oxazolyl, thiazolyl, imidazolyl, isoxazolyl, isothiazolyl, pyrridinyl, pyridazinyl, pyrimidinyl and piperazinyl.