This invention relates to a novel tetracyclic compound represented by formula (I): ##STR1## or its pharmacologically-acceptable salt. The compound of this invention has strong immunosuppressive activity, and is useful as an immunosuppressive agent and as an agent for treating autoimmune disease.
本发明涉及一种新型四环化合物,其
化学式为(I): ##STR1## 或其药学上可接受的盐。该化合物具有强烈的免疫抑制活性,可作为
免疫抑制剂和治疗自身免疫性疾病的药物。