9-((1R,3R,4R,7S)-7-(benzyloxy)-1-(((tert-butyldiphenylsilyl)oxy)methyl)-2,5-dioxabicyclo[2.2.1]heptan-3-yl)-2-chloro-9H-purin-6-amine

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