The invention provides compounds of Formula (I) as described herein, along with pharmaceutically acceptable salts, pharmaceutical compositions containing such compounds, and methods to use these compounds, salts and compositions for treating viral infections, particularly infections caused by hepatitis B virus, and reducing the occurrence of serious conditions associated with HBV.本發明提供如本文所描述之式(I)化合物 以及醫藥學上可接受之鹽、含有此等化合物之醫藥組合物,及使用此等化合物、鹽及組合物治療病毒感染,尤其由B型肝炎病毒引起之感染,且減少與HBV相關之重度病況之出現的方法。