Patent ID: 6916836

Claim:
A method for treating a viral infection in a warm-blooded animal comprising administering to the warm-blooded animal a therapeutically effective amount of a compound of the following formula: wherein, R 1 is —COOR 3 or —CONHR 3 ; when R 1 is —COOR 3 , R 3 is haloalkyl, alkenyl, haloalkenyl, cycloalkyl, cycloalkalkyl, heterocycloalkyl, heterocycloalkalkyl, substituted or unsubstituted benzyl, hydroxyalkyl, alkoxyalkyl, poly(alkoxy)alkyl, hydroxyalkoxyalkyl, hydroxypoly(alkoxy)alkyl, haloalkoxyalkyl, halopoly(alkoxy)alkyl, or aminoalkyl; when R 1 is —CONHR 3 , R 3 is haloalkyl, haloalkenyl, heterocycloalkyl, heterocycloalkalkyl, hydroxyalkyl, alkoxyalkyl, poly(alkoxy)alkyl, hydroxyalkoxyalkyl, hydroxypoly(alkoxy)alkyl, haloalkoxyalkyl, halopoly(alkoxy)alkyl, or aminoalkyl; and each of X and Y is independently hydrogen, alkyl, alkenyl, cycloalkyl, haloalkyl, haloalkenyl, halogen, nitro, or amino; a pharmaceutically acceptable salt thereof or a prodrug thereof.