BENZOFURAN- AND BENZO[B]THIOPHENE-2-CARBOXYLIC ACID AMIDE DERIVATIVES AND USE THEREOF AS HISTAMINE 3 RECEPTOR MODULATORS

摘要

The present invention relates to compounds of formula (I) wherein X, A and Rto Rare as defined in the description and claims, and pharmaceutically acceptable salts thereof. The compounds are useful for the treatment and/or prevention of diseases which are associated with the modulation of H3 receptors.