BENZO FIVE-MEMBERED NITROGEN HETEROCYCLIC PIPERIDINE OR PIPERAZINE DERIVATIVES AND PREPARATION METHODS AND PHARMACEUTICAL COMPOSITIONS THEREOF

摘要

The present invention relates to the compounds of formula (I) or pharmaceutically acceptable salts thereof: wherein R1, R2, X, &Ugr;, &Agr; and &Bgr; are defined in the description. Also disclosed in the present invention are the methods for preparing the compounds of formula (I) or pharmaceutically acceptable salts thereof, and pharmaceutical compositions comprising the compounds of formula (I) or pharmaceutically acceptable salts thereof.