A compound of formula ** Formula ** a pharmaceutically acceptable addition salt, a pharmaceutically acceptable solvate, or a stereochemically isomeric form thereof, wherein: each R1 is independently hydrogen; aryl; formyl; C1-6 alkylcarbonyl; C1-6alkyl; C1-6alkyloxycarbonyl; R2, R3, R6 and R7 are independently hydrogen; hydroxy; halo; C3-7cycloalkyl; C1-6alkyloxy; carboxyl; C1-6alkyloxycarbonyl; cyano; nitro; Not me; mono- or di (C1-6alkyl) amino; C 1-6 alkylhalo; C1-6alkyloxy polyhalo; - C (>; = O) R9; C1-6alkyl optionally substituted with halo, cyano or -C (>; = O) R9; C2-6alkenyl optionally substituted with halo, cyano or -C (>; = O) R9; C2-6alkynyl optionally substituted with halo, cyano or -C (>; = O) R9; R4 and R8 are independently hydroxy; halo; C3-7cycloalkyl; C1-6alkyloxy; carboxyl; C1-6alkyloxycarbonyl; formyl; cyano; nitro; Not me; mono- or di (C1-6alkyl) amino; C 1-6 alkylhalo; C1-6alkyloxy polyhalo; -C (>; = O) R9; -S (>; = O) rR9; - NH-S (>; = O) 2R9; -NHC (>; = O) H; -C (>; = O) NHNH2; -NHC (>; = O) R9; Het; -Y-Het; C1-6alkyl optionally substituted with halo, cyano, amino, mono- or di (C1-6alkyl) amino, -C (>; = O) -R9, Het or with C1-6alkyloxy; C2-6alkenyl optionally substituted with halo, cyano, amino, mono- or di (C1-6alkyl) amino, -C (>; = O) -R9, Het, or with C1-6alkyloxy; C2-6alkynyl optionally substituted with halo, cyano, amino, mono- or di (C1-6alkyl) amino, -C (>; = O) -R9, Het, or with C1-6alkyloxy.Un compuesto de fórmula**Fórmula** una sal de adición farmacéuticamente aceptable, un solvato farmacéuticamente aceptable, o una forma estereoquímicamente isómeras del mismo, en donde: cada R1 es independientemente hidrógeno; arilo; formilo; C1-6alquilcarbonilo; C1-6alquilo; C1-6alquiloxicarbonilo; R2, R3, R6 y R7 son independientemente hidrógeno; hidroxi; halo; C3-7cicloalquilo; C1-6alquiloxi; carboxilo; C1- 6alquiloxicarbonilo; ciano; nitro; amino; mono- o di(C1-6alquil)amino; polihaloC1-6alquilo; polihaloC1-6alquiloxi