The present invention concerns the compounds of formula wherein Z represents NH; Y represents —C3-9alkyl-, —C2-9alkenyl-, —C3-7alkyl-CO—NH optionally substituted with amino, mono- or di(C1-4alkyl)amino or C1-4alkyloxycarbonylamino-, —C3-7alkenyl-CO—NH— optionally substituted with amino, mono- or di(C1-4alkyl)amino- or C1-4alkyloxycarbonylamino-, C1-5alkyl-NR13—C1-5alkyl-, —C1-5alkyl-NR14—CO—C1-5alkyl-, —C1-6alkyl-CO—NH—, —C1-5alkyl-CO NR15—C1-5alkyl-, —C1-3alkyl-NH—CO-Het20-, —C1-2alkyl-CO-Het21-CO—, —C1-2alkyl-NH—CO—CR16R17—NH—, —C1-2alkyl-CO—NH—CR18R19—CO—, —C1-2alkyl-CO—NR20—C1-3alkyl-CO—, or —NR22—CO—C1-3alkyl-NH—; X1 represents a direct bond, O or —O—C1-2alkyl-; X2 represents a direct bond, —CO—C1-2alkyl-, NR12, —NR12—C1-2alkyl, —O—N═CH— or —C1-2alkyl-; R1 and R2 are hydrogen or halo; R3 are hydrogen; R4 represents hydrogen or C1-4alkyloxy; R12 and R13 are hydrogen or C1-4alkyl; R14 and R15 are hydrogen; R16 and R17 each independently represent hydrogen or C1-4alkyl; R18 and R19 are hydrogen or C1-4alkyl optionally substituted with phenyl or hydroxy; R20 and R21 are hydrogen or C1-4alkyl optionally substituted with C1-4alkyloxy; Het20, Het21 and Het22 are a heterocycle selected from the group consisting pyrrolidinyl, 2-pyrrolidinonyl or piperidinyl optionally substituted with hydroxy.