A compound of formula (I): ** Formula ** in which: A represents ** Formula ** in which asterisks indicate the bond that binds to the pyrimidine group of formula (I)； R1 represents C1-4 alkoxy, C1-4 alkylamino, N-C1-4 alkyl-N-C1-3 alkylamino, C3-5 cycloalkylamino, C3-5 cycloalkylmethylamino, pyrrolidine or piperidine； R2 represents C1-2 alkyl or C3-4 alkyl； R3 represents hydrogen, C1-4 alkyl, or C1-3 alkoxy； R4 represents hydrogen, C1-4 alkyl, or C1-3 alkoxy.Un compuesto de fórmula (I):**Fórmula** en la que: A representa**Fórmula** en las que los asteriscos indican el enlace que se une al grupo pirimidina de fórmula (I)； R1 representa alcoxi C1-4, alquilamino C1-4, N-alquilo-C1-4-N-alquilamino-C1-3, cicloalquilamino C3-5, cicloalquilmetilamino C3-5, pirrolidina o piperidina； R2 representa alquilo C1-2 o alquilo C3-4； R3 representa hidrógeno, alquilo C1-4, o alcoxi C1-3； R4 representa hidrógeno, alquilo C1-4, o alcoxi C1-3.
