The beta-anomer of compounds of formula (I) is preferred, and that anomer is illustrated below in formula (II): Preferred nucleosides of the instant invention include compounds of the following formulae (III) through (X): where X is a halogen group (F, Cl, Br or I); where X is a halogen group (F, Cl, Br or I) and A is an alkyl group; where X is a halogen group (F, Cl, Br or I); where X is a haloge