HETEROCYCLIC DERIVATIVE AND MEDICINE

A pharmaceutical composition comprising a compound of the following general formula ÄIÜ or its salt. wherein R represents aryl or a heteroaromatic group. R represents hydrogen, alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, hydroxyalkyl, haloalkyl, alkoxy, alkylthio, amino, monoalkylamino, dialkylamino, or phenyl. R and R independently represent hydrogen or alkyl or R and R taken together with the adjacent N atom represent a 5- through 7-membered cyclic amino group. A represents C2-10 alkylene. W represents O, S, or (CH)n (where CH may be substituted by alkyl; n is an integer of 0, 1 or 2). X, Y, and Z may be the same or different and each represents CH (which may be substituted by alkyl), or N. Provided, however, that the case in which X, Y, and Z concurrently represent CH is excluded. The compound of the invention has excellent neuronal death inhibitory activity and is useful as a therapeutic drug for cerebrovascular diseases.