Disclosed are compounds of formula (I): as antiviral agents, pharmaceutical compositions comprising such compounds, and a method of use of these compounds, wherein R1, Ar1, Ar2, X, Y, m, n, and o are as defined in the specification. These compounds are antiviral agents and are contemplated in the treatment of viral infections, for example, hepatitis C.揭露具有化學式(I)之化合物:作為抗病毒劑,包含此等化合物之藥學組成物,及使用此等化合物之一方法,其中,R1、Ar1、Ar2、X、Y、m、n,及o係於說明書中定義。此等化合物及抗病毒劑係被考慮治療例如C-型肝炎之病毒感染。