Pharmacologically active catechol derivatives

摘要: A compound according to formula 1 ##STR1## wherein R and 2 independently represent hydrogen, carbamoyl which is substituted by an alkyl of 4 carbon atoms, alkylcarbonyl 5 atoms or phenyl carbonyl, X represents halogen nitro cyano 3 ##STR2## unsubstituted with 8 hydroxyalkyl pharmaceutically acceptable esters salts thereof, a carrier therefor, as well pharmaceutical compositions containing said compounds COMT inhibitors.