Patent ID: 7504434

Claim:
A method for the prevention of an orthomyxovirus or paramyxovirus infection comprising the step of administration to a subject in need thereof of an effective amount of a compound of formula (I) in which R is an amino or guanidino group; R 2 is acetyl or trifluoroacetyl; n and q are either the same or different and selected from 0, 1 or 2; and x is an optionally substituted phenyl, optionally substituted naphthyl or optionally substituted phenyl-Y-optionally substituted phenyl in which Y is selected from a covalent bond, CH 2 , CH 2 CH 2 , O or SO 2 , or a pharmaceutically acceptable salt, ether, ester or salt of such ester thereof, with the proviso that when X is phenyl or naphthyl, n and q are both 2 and when X is phenyl-Y-phenyl in which Y is a covalent bond, then n and q are not both 0.