| abstract |
A succinimide derivative of the formula: ##STR1## wherein A is straight or branched C 2 -C 6 alkylene or alkenylene, B is straight or branched C 3 -C 5 alkylene, D is straight or branched C 2 -C 3 alkylene, E is straight or branched C 2 -C 3 alkylene, R 1 and R 2 are each hydrogen or C 1 -C 4 alkyl, or they may form a single bond and R 3 is a phenyl group optionally substituted with C 1 -C 4 alkyl, C 1 -C 4 alkoxy, halogen and/or trifluoromethyl, a 2-pyridyl group optionally substituted with halogen, a 2-pyrimidyl group optionally substituted with halogen, a group of the formula: ##STR2## (in which R 4 is hydrogen or phenyl), a group of the formula: CO--R 5 (in which R 5 is adamantyl or furyl) or hydroxy (C 2 -C 4 ) alkyl, and an acid addition salt thereof, which are useful as anti-anxiety drugs and/or anti-allergic drugs. |