3',5'-di-O-benzyl-5-methyl-3'-C,4'-C-ethoxymethyleneuridine

3,5-Di-O-benzyl-3-C-hydroxyethyl-1,2-O-isopropylidene-4-C-(p-toluenesulfonyloxymethyl)-α-D-ribofuranose

3'-C-acetyloxyethyl-3',5'-di-O-benzyl-5-methyl-4'-C-(p-toluenesulfonyloxymethyl)uridine

Toluene-4-sulfonic acid (2S,3S,4R,5R)-3-benzyloxy-2-benzyloxymethyl-3-(2-hydroxy-ethyl)-4-(1-methoxy-1-methyl-ethoxy)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethyl ester