Abstract: Guanidine derivatives of the formula: ##STR1## in which R.sup.1 is a cyclohexyl, adamantyl, bicycloheptanyl, bicycloheptenyl, tricycloheptanyl or tetracyclononanyl radical and R.sup.2 is a phenyl or pyridyl radical optionally substituted by 1 or 2 halogen atoms, or alkyl, cyanoalkyl, alkoxycarbonyl or amino radicals, and the pharmaceutically-acceptable acid-addition salts thereof, active against rhinoviruses, are disclosed, along with processes for their manufacture, compositions containing them, a method of combatting rhinoviral infections and a method of selectively killing rhinoviruses in a mixed virus population.

Abstract: The disclosure relates to novel aromatic compounds which possess antiviral activity, to processes for their manufacture and to a method of selectively inhibiting rhinovirus growth in the presence of other viruses.