3-ureido-5-(6-(3-iodobenzylamino)purin-9-yl)-4-t-butyldimethylsiloxy-tetrahydro-furan-2-carboxylic acid methyl amide

3-(3-chloroacetylureido)-5-(6-(3-iodobenzylamino)purin-9-yl)-4-t-butyldimethylsiloxy-tetrahydro-furan-2-carboxylic acid methyl amide