Novel tricyclic compound represented by formula ##STR1## possess a TXA.sub.2 biosynthesis inhibiting activity and/or a TXA.sub.2 receptor antagonizing activity, and are expected to have preventive and therapeutic effects on ischemic diseases, cerebro-vascular diseases, etc.
由公式##STR1##表示的新型
三环化合物具有TXA.sub.2
生物合成抑制活性和/或TXA.sub.2受体拮抗活性,并预计对缺血性疾病、脑血管疾病等具有预防和治疗作用。