The present invention relates to compounds of the formula I as described below or a tautomer or a pharmaceutically acceptable salt thereof； to a pharmaceutical composition containing such compounds； and to said compounds of the formula I or a tautomer or a pharmaceutically acceptable salt thereof for use as a medicament, especially for use in the treatment or prevention of a disease or disorder selected from the group consisting of an inflammatory disease, a hyperproliferative disease or disorder, a hypoxia-related pathology and a disease characterized by excessive vascularization, wherein X1 is CR1 or N； X2 is CR2 or N； X3 is CR3 or N； X4 is CR4 or N； Y1 is N, NR5a, S, O or CR5b； Y2 is N, NR5c, S, O or CR5d； Z is N or C； with the proviso that at most two of X1, X2, X3 and X4 are N； with the proviso that Y1 is not O if Y2 is CR5d and simultaneously Z is C； with the proviso that Y1 and Y2 are not both simultaneously O or S； with the proviso that at least one of Y1, Y2 and Z is a heteroatom or heteroatom-containing group； L1 is a bond, optionally substituted C1-C6-alkylene or C3-C8-cycloalkylene； L2 is a bond, optionally substituted C1-C6-alkylene, C3-C8-cycloalkylene etc.； A is 3-, 4-, 5-, 6-, 7- or 8-membered optionally substituted, saturated, partially unsaturated or maximally unsaturated carbocyclic or heterocyclic ring； or L2-A forms a group C1-C6-alkylene-OR13, C1-C6-alkylene-SR14 or C1-C6-alkylene-NR15R16； and R1, R2, R3, R4, R5a, R5b, R5c, R5d, R6, R13, R14, R15 and R16 are as defined in the claims and the description.La présente invention concerne des composés de formule I tels que décrits ci-dessous ou un tautomère ou un sel pharmaceutiquement acceptable de ceux-ci ； une composition pharmaceutique contenant de tels composés ； et lesdits composés de formule I ou un tautomère ou un sel pharmaceutiquement acceptable de ceux-ci pour une utilisation en tant que médicament, en particulier pour une utilisation dans le traitement ou la prévention d'une maladie ou d'
