Compounds of Formula I, including their salts, as well as compositions and methods of using the compounds are set forth. The compounds have activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV:本文闡述式I化合物(包括其鹽)以及使用該等化合物之組合物及方法。該等化合物具有抵抗C型肝炎病毒(HCV)之活性且可用於治療感染HCV者: