Novel anti-viral agents of Formula wherein: A represents OR1, NR1R2, or R1 wherein R1 and R2 are
hydrogen, C1-6
alkyl,
aryl, heteroaryl, arylalkyl, or heteroarylalkyl; or R1 and R2 together with the
nitrogen atom to which they are attached form a 5 or 6 membered saturated cyclic group; B represents C(O)R3 wherein R3 is C1-6
alkyl,
aryl, heteroaryl, arylalkyl, or heteroarylalkyl; C represents C1-6
alkyl,
aryl, heteroaryl or heterocyclyl; D represents a saturated or unsaturated optionally substituted 6-membered heterocyclic ring; E represents
hydrogen or C1-6-alkyl; F represents
hydrogen, C1-6alkyl, aryl or heteroaryl; and G represents hydrogen, C1-6alkyl, heterocyclylalkyl, arylalkyl or heteroarylalkyl; and salts, solvates and esters thereof, processes for their preparation and methods of using them in
HCV treatment are provided.