abstract |
Compounds represented by formula (I): o pharmaceutically acceptable salts and solvates thereof, wherein R1, X, Y, Y1 and Z are as defined herein, are useful for treating viral infections by flaviviridae. The viral infection is Hepatitis C virus (HCV), bovine viral diarrhea virus (BVDV), pig cholera virus, dengue fever virus, Japanese encephalitis virus or yellow fever virus. |