| abstract |
Isoquinoline derivatives of the formula ##STR1## wherein the symbol A 1 represents an isoquinol-8-yl, 3-methylisoquinol-8-yl, 3-hydroxymethylisoquinol-5-yl, 3-carboxymethylisoquinol-5-yl, quinol-5-yl, thienopyridyl, benzimidazolyl, thienyl or thiazolyl radical, a 4-(or 5-)carboxyalkylthiazol-2-yl radical in which the alkyl moiety is linear or branched and contains 1 to 4 carbon atoms, or a 1,3,4-thiadiazol-2-yl, pyrazolyl, imidazolyl, pyrimidinyl, pyridazinyl or pyrazinyl radical, monocyclic heterocyclic rings within the definition of A 1 being optionally substituted by a linear or branched alkyl radical containing 1 to 4 carbon atoms, in the (S) or (R,S) form or mixtures thereof, and salts thereof possess useful pharmocological properties, in particular antiviral activity. |