In vitro activity of AG7088 against HRV serotypes. EC50 (A) and EC90 (B) of AG7088, pleconaril, and pirodovir for 48, 45, and 47 HRV serotypes, respectively, were determined by measuring XTT dye reduction following 2 to 5 days of infection of H1-HeLa cells as described in Materials and Methods.