| abstract |
Provided is a compound represented by formula (1) or a pharmacologically acceptable salt thereof. [Wherein, A is a group represented by the following formula (A-1); R 1a and R 1b are each independently the same or different and are C 1-6 alkyl groups optionally substituted with 1 to 3 halogen atoms; m and n are each independently X 1 is a hydroxyl group or an aminocarbonyl group; Z 1 is a single bond or the like; R 2 is an optionally substituted C 1-6 alkyl group, substituted A C 6-10 aryl group which may be substituted . ] |