Disclosed is the use of a compound of formula (I) in the manufacture of a medicament for treating viral infections where in the substituents are as disclosed in the specification and examples of compounds of formula (I) are: (2S,3R,4R,5R)-2-(4-Aminopyrrolo[1,2-j][1,2,4]triazin-7-yl)-5-(hydroxymethyl)-3-methyltetrahydrofuran-3,4-diol (2S,3R,4R,5R)-2-(4-(Dimethylamino)pyrrolo[1,2-j][1,2,4]triazin-7-yl)-5-(hydroxymethyl)-3-methyltetrahydrofuran-3,4-diol and (2S,3R,4R,5R)-2-(4-Amino-5-bromopyrrolo[1,2-j][1,2,4]triazin-7-yl)-5-(hydroxymethyl)-3-methyltetrahydrofuran-3,4-diol. Examples of the viral infection are from the group consisting of: hepatitis B, hepatitis C, human immunodeficiency virus, Polio, Coxsackie A and B, Rhino, Echo, small pox, Ebola, and West Nile virus.
