Provided are prodrugs of pyrrolo[1,2-f][1,2,4]triazin-7-yl nucleoside phosphates wherein the 1’ position of the nucleoside sugar is substituted with CN. The compounds, compositions, and methods provided are useful for the treatment Hepatitis C infections.本發明提供吡咯并[1,2-f][1,2,4]三-7-基核苷磷酸酯的前藥,其中核苷糖的1’位置被CN取代。所提供的化合物、組成物及方法可用於治療C型肝炎感染。