Acetic acid (3R,4S,5S)-2-acetoxy-4-benzyloxy-5-(tert-butyl-diphenyl-silanyloxymethyl)-5-(toluene-4-sulfonyloxymethyl)-tetrahydro-furan-3-yl ester

4-N-benzoyl-3'-O-benzyl-2'-O,4'-C-(methylenoxymethylene)cytidine