| abstract |
Disclosed is a compound effective for treating neurodegenerative disorders such as Parkinson's disease or Huntington's disease, as well as psychosis, impotence, renal failure, heart failure or hypertension. The above diseases are treated with a catecholamine derivative of formula I. [Wherein n is 1, R 1 and R 2 are condensed to form a methylene (CH 2 ) group, and R 3 is hydrogen, methyl, ethyl, n-propyl, cyclopropyl, cyclobutyl, Selected from the group consisting of allyl, propargyl, hydroxyethyl, 3-fluoropropyl and 2-fluoroethyl] [Selection figure] None |