(2008/06/13)
Acetic acid (3R,4R,5R)-4-acetoxy-5-acetoxymethyl-2-[2-amino-6-(toluene-4-sulfonyloxy)-purin-9-yl]-tetrahydro-furan-3-yl ester
Acetic acid (3R,4R,5R)-4-acetoxy-5-acetoxymethyl-2-[2-amino-6-(2,4,6-triisopropyl-benzenesulfonyloxy)-purin-9-yl]-tetrahydro-furan-3-yl ester
Acetic acid (3R,4R,5R)-4-acetoxy-5-acetoxymethyl-2-[2-amino-6-(2,4,6-trimethyl-benzenesulfonyloxy)-purin-9-yl]-tetrahydro-furan-3-yl ester