A novel tetracyclic compound useful as an immuno-suppressant, represented by general formula (I), or a pharmacologically acceptable salt thereof wherein X¹ and X² may be the same or different from each other and each represents hydrogen or lower alkyl, and n represents an integer of 1 to 4.
一种可用作
免疫抑制剂的新型四环化合物,由通式(I)表示,或其药理上可接受的盐 其中 X¹ 和 X² 可以相同或不同,各自代表氢或低级烷基,n 代表 1 至 4 的整数。