NOVEL CATECHOL DERIVATIVE, PHARMACEUTICAL COMPOSITION CONTAINING THE SAME, USE OF THE CATECHOL DERIVATIVE, AND USE OF THE PHARMACEUTICAL COMPOSITION

摘要

The present invention provides compounds represented by general formula (I):
or pharmaceutical acceptable salts thereof, wherein R 1 and R 2 are each hydrogen, lower acyl, lower alkoxycarbonyl or the like; R 3 is halo-lower alkyl, lower acyl, halo-lower alkylcarbonyl, cycloalkylcarbonyl,optionallysubstituted arylcarbonyl,lower alkoxycarbonyl or the like; R 4 is lower alkyl, halo-lower alkyl, cycloalkyl, lower alkoxy-lower alkyl or the like, which exhibit potent COMT inhibitory activities. The present invention also provides pharmaceutical compositions containing said compound, and uses thereof.