| abstract |
The present invention relates to the use of nucleoside derivatives of formula I n n n wherein B signifies a 9-purinyl residue B1 of formula n n n or a 1-pyrimidyl residue B2 of formula n n n wherein the symbols are as defined in the specification, n and of pharmaceutically acceptable salts thereof; for the treatment of diseases mediated by the Hepatitis C Virus (HCV), for the preparation of a medicament for such treatment and to pharmaceutical compositions containing such compounds. |