| abstract |
The present invention relates to new compounds of general formula wherein Ar represents an optionally substituted thienyl, furyl, pyri dyl or phenyl group; R represents a linear or branched alkyl radical of 1 to 7 carbon atoms; and one of the two substituents X₁ or X₂ represents nitrogen, the other being carbon, and their pharmaceutically acceptable acid addition salts, having advantageous cardiovascular properties. |