2-N-(benzyloxycarbonyl)-3',5'-bis-O-(tert-butyldimethylsilyl)-2'-deoxyguanosine

{6-Benzyloxy-9-[(2R,4S,5R)-4-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-9H-purin-2-yl}-carbamic acid benzyl ester