| abstract |
The compounds of the general Formula I, wherein R<1> stands for hydrogen or lower alkyl; one of symbols X and Y stands for hydrogen or halogen and the other represents a group of the general Formula II, R<2> is hydrogen or lower alkyl; n is 1, 2 or 3; R<3> is hydrogen, lower alkyl or aryl-lower alkyl; Z is -0-; or R<3> and Z together with the intermediate atoms form a piperazino ring; Q and W independently from each other stands for -CH= or -N=; and R<4>, R<5> and R<6> can be the same or different and stand for hydrogen, halogen, trifluoromethyl or lower alkoxy; or R<4> and R<5> together form an ethylenedioxy group) and pharmaceutically acceptable salts thereof can be used for the treatment or prophylaxis of malfunctions of memory and/or cognitive decline or prevention of decline of learning abilities. |