Abstract: A cyclic amide compound of the formula: ##STR1## wherein X is a hydrogen atom, a halogen atom, a lower alkyl group, a haloalkyl group, a lower alkoxy group, a haloalkoxy group, a lower alkylthio group or a nitro group; Y is a hydrogen atom, a halogen atom, an alkykl roup, a cycloalkyl group, an alkenyl group, an alkylnyl group, a haloalkyl group, a phenyl group, an alkoxy group, a cycloalkoxy group, a cycloalkylalkoxy group, an alkenyloxy group, an alkynloxy group, a benzyloxy group, a phenoxy group, a haloalkoxy group, a lower alkoxy-lower alkoxy group, a cyanoalkoxy group, an alkylthio group, an alkenylthio group, an alkynylthio group, a benzylthio group, a phenylthio group, ##STR2## (wherein W is an oxygen atom or a sulfuratom, R.sup.3 is a hydrogen atom or an alkyl group and R.sup.4 is an alkyl group), ##STR3## (wherein each of R.sup.5 and R.sup.6 is a hydrogen atom or a lower alkyl group), an alkylsulfonyl group, ##STR4## (wherein R.sup.5 and R.sup.

Abstract: A cyclic amide compound of the formula: ##STR1## wherein X is a hydrogen atom, a halogen atom, a lower alkyl group, a haloalkyl group, a lower alkoxy group, a haloalkoxy group, a lower alkylthio group or a nitro group; Y is a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, a haloalkyl group, a phenyl group, an alkoxy group, a cycloalkoxy group, a cycloalkylalkoxy group, an alkenyloxy group, an alkynyloxy group, a benzyloxy group, a phenoxy group, a haloalkoxy group, a lower alkoxy-lower alkoxy group, a cyanoalkoxy group, an alkylthio group, an alkenylthio group, an alkynylthio group, a benzylthio group, a phenylthio group, ##STR2## (wherein W is an oxygen atom or a sulfur atom, R.sup.3 is a hydrogen atom or an alkyl group and R.sup.4 is an alkyl group), ##STR3## (wherein each of R.sup.5 and R.sup.6 is a hydrogen atom or a lower alkyl group, an alkylsulfonyl group, ##STR4## (wherein R.sup.5 and R.sup.

Abstract: A thiadiazabicyclononane derivative having the formula: ##STR1## wherein X is hydrogen or halogen, R.sup.1 is hydrogen or alkyl, R.sup.2 is alkenyloxy, alkynyloxy, alkylthio, halogen-substituted alkoxy, alkoxycarbonylalkoxy, .alpha.,.alpha.-dimethylbenzylamino, --OC.sub.2 H.sub.4 S(O).sub.l R.sup.3 (wherein R.sup.3 is alkyl or phenyl, and l is an integer of 0 or 2), ##STR2## (wherein Y is halogen, alkyl, alkoxy or nitro, R.sup.4 is hydrogen or alkyl, and each of m and n is an integer of 0, 1 or 2), --OC.sub.2 H.sub.4 OR.sup.5 (wherein R.sup.5 is phenyl, benzyl or methoxyalkyl), --OCH.sub.2 R.sup.6 (wherein R.sup.6 is styryl, cyanoalkyl, tetrahydrofuran-2-yl, thienyl or pyridin-2-yl), ##STR3## (wherein R.sup.

Abstract: 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.

Abstract: 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.