N-substituted piperizine derivatives

摘要

This invention provides pyridylthiazolidine carboxamide derivative shown by general formula (I) and pharmaceutically acceptable salts thereof: <IMAGE> wherein A1 is a single bond, carbonyl group or lower alkylene group which may include a carbonyl group and R1 is a heterocyclic ring which may be substituted with a lower alkyl group and further provides N-substituted piperazine derivatives useful as intermediates for preparing said compounds (I).