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

(2S,3S,4R,5R)-3-Azido-5-(2-chloro-6-methylamino-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

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