Tricyclic imidazole derivatives of the formula ##STR1## wherein R.sup.1 is 2-pyridyl optionally substituted by lower alkyl or lower alkoxy, n is the integer 0 to 1, R.sup.2 is hydrogen or lower alkyl, R.sup.3 and R.sup.4, independently, are hydrogen or lower alkyl, A is a group of the formula ##STR2## m is the integer 2 or 3, R.sup.5, R.sup.6, R.sup.7 and R.sup.8, independently, are hydrogen or lower alkyl, and R.sup.9 is hydrogen and R.sup.10 is hydrogen or lower alkyl or R.sup.9 and R.sup.10 taken together are oxo, provided that at least one of R.sup.3 and R.sup.4 is lower alkyl when A is a group of the formula --CH.dbd.CH--CH.dbd.CH-- or --(CH.sub.2).sub.4 --, and their pharmaceutically acceptable acid addition salts. The compounds of formula I inhibit gastric acid secretion and prevent the formation of gastric ulcers.
公式为##STR1##的
三环咪唑衍
生物,其中R.sup.1是2-
吡啶基,可选择性地被低烷基或低烷氧基取代,n为整数0至1,R.sup.2为氢或低烷基,R.sup.3和R.sup.4独立地为氢或低烷基,A为公式##STR2##的基团,m为整数2或3,R.sup.5、R.sup.6、R.sup.7和R.sup.8独立地为氢或低烷基,R.sup.9为氢,R.sup.10为氢或低烷基,或R.sup.9和R.sup.10共同为氧代,但当A为--CH.dbd.CH--CH.dbd.CH--或--(CH.sub.2).sub.4--的基团时,R.sup.3和R.sup.4中至少有一个为低烷基。这些公式I的化合物能够抑制胃酸分泌并预防胃溃疡的形成,其药物可接受的酸盐。