4'-C-acetoxymethyl-2'-O-acetyl-3'-O-benzyl-5'-O-tert-butyldiphenylsilyl-5-methyluridine

{3-[(2,2-dimethyl-1,1-diphenyl-1-silapropoxy)methyl]-(1S,3R,4S,5R)-7,7-dimethyl-2,6,8-trioxa-4-(phenylmethoxy)bicyclo[3.3.0]oct-3-yl}methan-1-ol