Benzofuran derivatives, pharmaceutical composition containing the same, and a process for the preparation of the active ingredient

摘要

The present invention is a piperazinylalkylbenzofuran derivative of the formula wherein R<1 >represents a C1-4 alkyl group, R<2 >stands for a hydrogen atom, X means an oxygen atom, Y is a hydroxyl group, Z represents a hydrogen atom, Ar' represents a diphenylmethyl group, a pyridyl group, a partially saturated 5-membered heterocyclic group or a phenyl group, n has a value of 0 or 1, and pharmaceutically suitable acid addition salts thereof.