A medicinal composition having a brain-protecting action

摘要

A pharmaceutical composition for protection of brain cells containing as an active component a piperazine derivative having the formula: CHEM wherein R1 is hydrogen or a lower alkyl group, R2 is hydroxyl, an aralkyloxy group, a lower alkoxy group having 1-5 carbon atoms or a lower alkenyloxy group having 3-5 carbon atoms, R3 is hydrogen, an aralkyloxy group, a lower alkoxy group having 1-5 carbon atoms or a lower alkenyloxy group having 3-5 carbon atoms and R4 is hydrogen or a lower alkoxy group having 1-5 carbon atoms.