(2R,3S,5R)-3-Benzoyloxy-2-benzoyloxymethyl-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-carboxylic acid

1-((2R,4S,5S)-4-Hydroxy-5-hydroxymethyl-5-trityloxymethyl-tetrahydro-furan-2-yl)-5-methyl-1H-pyrimidine-2,4-dione