Disclosed is a compound represented by formula (1) or a pharmacologically acceptable salt thereof (In the formula, A represents a group that is represented by formula (A-1); R
1a
and R
1b
may be the same or different and each independently represents a C
1-6
alkyl group which may be substituted by one to three halogen atoms; m and n each independently represents an integer of 0-5; X
1
represents a hydroxyl group or an aminocarbonyl group; Z
1
represents a single bond or the like; and R
2
represents an optionally substituted C
1-6
alkyl group, an optionally substituted C
6-10
aryl group or the like.)