| abstract |
Disclosed are a drug for treating hepatitis C virus, a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable prodrug thereof. A 1 ', 2', or 3 'modified nucleoside compound represented by formula I, a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable prodrug thereof. (R 1 to R 3 are each independently H, phosphoric acid, acyl group, etc .; X 1 and X 2 are each independently H, linear / branched / cyclic alkyl group, etc .; Y is H, halogen) [Selection figure] None |