5,6-dihydroimidazo[2,1-b]thiazole-2-carboxamide derivatives represented by the following general formula [I] ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are either the same or different and mean individually a hydrogen atom or lower alkyl group, Y denotes a specific phenyl-containing substituted amino group, and their salts. These compounds have excellent immuno-modulating activities.
下列通式[I]所代表的5,6-二氢
咪唑[2,1-b]
噻唑-2-羧酰胺衍
生物 ##STR1## 其中,R.sub.1、R.sub.2、R.sub.3和R.sub.4分别相同或不同,分别表示氢原子或较低的烷基基团,Y表示一种特定的含苯基取代的
氨基基团,以及它们的盐。这些化合物具有优异的免疫调节活性。