The invention provides compounds of Formula (A): as further described herein, as well as pharmaceutical compositions comprising such compounds, and methods to use the compounds and pharmaceutical compositions for treatment of certain viral disorders, including influenza.本發明提供如本文進一步所闡述之式(A)化合物: 以及包含此等化合物之醫藥組合物,及使用該等化合物及醫藥組合物用於治療包括流感之某些病毒病症之方法。