Table 2.

Antiviral activity of compounds 1 and 2 against influenza A virus in MDCK cells^a

^aResults are presented as mean IC₅₀ values obtained from three independent experiments carried out in triplicate ± SD.

^bConcentration required to reduce cell growth by 50%.

^cConcentration required to inhibit virus-induced cytopathic effect by 50%.

^dTherapeutic index = CC₅₀/IC₅₀.