((1S,3R,4R,7S)-7-(benzyloxy)-3-(2,6-diamino-7H-purin-7-yl)-2,5-dioxabicyclo[2.2.1]heptan-1-yl)methanol

(2R,3R,4S,5S)-4-(benzyloxy)-5-((tert-butyldiphenylsilyloxy)methyl)-2-(2,6-diamino-7H-purin-7-yl)-5-(tosyloxymethyl)tetrahydrofuran-3-yl acetate

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

7-((1R,3R,4R,7S)-7-(benzyloxy)-1-((tert-butyldiphenylsilyloxy)methyl)-2,5-dioxabicyclo[2.2.1]heptan-3-yl)-7H-purine-2,6-diamine