Tricyclic derivatives of octahydroisoquinoline of formula (I), wherein n is zero or 1 and if n is zero, one of X or Y is NH, oxygen or sulphur, and the other is NH, CH or a R.sub.4 - or R.sub.5 -substituted carbon atom; if n is 1, then X and Y are both nitrogen, or one of them is nitrogen and the other is CH or an R.sub.4 - or R.sub.5 -substituted carbon atom, have selective receptor agonist or antagonist activity, and are of potential therapeutic utility as analgesics or immunomodulating and/or cardiovascular agents. ##STR1##
式(I)的八氢
异喹啉的
三环衍
生物,其中n为零或1,如果n为零,则X或Y之一为NH、氧或
硫,另一个为NH、CH或R.sub.4-或R.sub.5-取代的碳原子;如果n为1,则X和Y都是氮,或其中一个是氮,另一个是CH或R.sub.4-或R.sub.5-取代的碳原子,具有选择性受体激动剂或拮抗剂活性,并具有潜在的治疗效用,可用作镇痛剂或免疫调节和/或心血管药物。