drogen atom, or pharmacologically acceptable salts thereof; (32) compounds according to any one of (1) to (31) wherein R7 is 1 to 2 groups selected from the group consisting of a hydrogen atom, a hydroxyl group and a lower alkyl group, or pharmacologically acceptable salts thereof; (33) compounds according to any one of (1) to (31) wherein R7 is a hydrogen atom, or pharmacologically acceptable sal