(2R,3S,5R)-2-Hydroxymethyl-5-[6-[2-(4-nitro-phenyl)-ethoxy]-2-(3-[2,2';5',2'']terthiophen-5-yl-propylamino)-purin-9-yl]-tetrahydro-furan-3-ol

{9-[(2R,4S,5R)-4-(tert-Butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-6-[2-(4-nitro-phenyl)-ethoxy]-9H-purin-2-yl}-(3-[2,2';5',2'']terthiophen-5-yl-propyl)-amine