Toluene-4-sulfonic acid 1-allyloxymethyl-3-[(3aR,4R,6R,6aR)-2,2-dimethyl-6-(3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-propyl ester

Acetic acid 4-[(3aR,4R,6R,6aR)-2,2-dimethyl-6-(3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-2-(toluene-4-sulfonyloxy)-butyl ester