A compound represented by the following formula (I), a pharmacologically acceptable salt thereof or a hydrate thereof or a solvate thereof, which shows not only a C5a receptor antagonistic activity but also high activity in the biological availability, as compared to its racemate.
以下式子(I)所代表的化合物,其药理学上可接受的盐、
水合物或溶剂化物,不仅显示出C5a受体拮抗活性,而且相对于其外消旋体具有高
生物利用度的活性。