The present invention relates to a compound represented by the Formula [I]:Wherein:the A ring is a 5-membered aromatic heterocyclic group containing at least one hetero atom selected from a nitrogen atom, and the like A1 and A2, are each a nitrogen atom, and the like X2, X3, X4, and X5 are all carbon atoms, or alternatively any one of X2, X3, X4, and X5 is a nitrogen atom and the rest are all carbon atoms R1 is a hydrogen atom, or the like R2, R3, R4, and R5, are each a hydrogen atom, or the like R6 and R6, are each a hydrogen atom, and the like R7 is an aryl group and the like and R8 is an amino group or a hydroxy group,or a pharmaceutically acceptable salt or ester thereof.
