A compound represented by the formula (I): in which R1 is a group represented by the formula: -COR2 in which R2 is (a) a C1-6 alkyl group optionally substituted with 1 to 3 halogen atoms； (b) a C1-6 alkoxy group； or (c) an optionally mono or disubstituted amino group with a C1-6 alkyl group or groups； R3 is a C1-6 alkyl group optionally substituted with a halogen atom or atoms, or an optionally substituted C3-6 cycloalkyl group； R4a and R4b are independently a hydrogen atom or a substituent； X is O, CO, CR5aR5b, in which R5a and R5b are independently a hydrogen atom or a substituent, NR5c, in which R5c is a hydrogen atom or an optionally substituted C1-6 alkyl group, S, SO or S (O) 2； Ring A is an additionally optionally substituted 5 or 6 membered aromatic ring； for the P ring and the Q ring, (1) the P ring is an additionally optionally substituted 5-membered aromatic ring, the Q ring is an optionally substituted 6-membered ring, and the P ring and the Q ring are fused to forming an additionally optionally substituted bicyclic aromatic ring, or (2) the P ring is an additionally optionally substituted 5-membered non-aromatic ring, the Q ring is an additionally optionally substituted 6-membered aromatic ring, and the P ring and the Q ring fuse to form an additionally optionally substituted bicyclic non-aromatic ring； and R6 is an optionally substituted C1-6 alkyl group or an optionally substituted C3-6 cycloalkyl group, or a pharmacologically acceptable salt thereof.Un compuesto representado por la fórmula (I): en la que R1 es un grupo representado por la fórmula: -COR2 en la que R2 es (a) un grupo alquilo C1-6 opcionalmente sustituido con 1 a 3 átomos de halógeno； (b) un grupo alcoxi C1-6； o (c) un grupo amino opcionalmente mono o disustituido con un grupo o grupos alquilo C1-6； R3 es un grupo alquilo C1-6 opcionalmente sustituido con un átomo o átomos de halógeno, o un grupo cicloalquilo C3-6 opcionalmente sustituido； R4a y R4b son independientemente un átomo de hi
