Methods of inhibiting the replication of influenza viruses in a biological sample or patient, of reducing the amount of influenza viruses in a biological sample or patient, and of treating influenza in a patient, comprises administering to said biological sample or patient a safe and effective amount of a compound represented by any of Formulas I-III, or a pharmaceutically acceptable salt thereof. A pharmaceutical composition comprises a safe and effective amount of such a compound or pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier, adjuvant or vehicle.
