| 摘要 |
Provided are pyrrolo[ 1,2-fl [1,2,4]triazinyl, imidazo[ 1,5-fl [1,2,4]triazinyl, imidazo[ 1,2 f][1,2,4]triazinyl, and [1,2,4]triazolo[4,3-f][1,2,4]triazinyl nucleosides, nucleoside phosphates and prodrugs thereof, wherein the I 'position of the nucleoside sugar is substituted. The 5 compounds, compositions, and methods provided are useful for the treatment of Flaviviridae virus infections, particularly hepatitis C infections. Formula (I), each X or X2 is independently C-R 10or N. Fonnula I |
