(2S,3R,4R,5R)-3-Azido-4-(tert-butyl-dimethyl-silanyloxy)-5-(2-chloro-6-methylamino-purin-9-yl)-tetrahydro-furan-2-carboxylic acid methylamide

(2S,3R,4R,5R)-3-Amino-4-(tert-butyl-dimethyl-silanyloxy)-5-(2-chloro-6-methylamino-purin-9-yl)-tetrahydro-furan-2-carboxylic acid methylamide

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

(2S,3S,4R,5R)-3-Azido-5-[2-chloro-6-(3-iodo-benzylamino)-purin-9-yl]-4-hydroxy-tetrahydro-furan-2-carboxylic acid methylamide

(2S,3R,4R,5R)-4-(tert-Butyl-dimethyl-silanyloxy)-5-(2-chloro-6-methylamino-purin-9-yl)-3-ureido-tetrahydro-furan-2-carboxylic acid methylamide