2-acetamido-6-ethoxy-8-methanesulfonyl-9-(3,5-di-O-acetyl-2-O-tosyl-1-β-D-ribofuranosyl)-9H-purine
Acetic acid (2R,3R,4R,5R)-2-acetoxymethyl-5-(2-acetylamino-6-ethoxy-8-methylsulfanyl-purin-9-yl)-4-(toluene-4-sulfonyloxy)-tetrahydro-furan-3-yl ester
2-acetamido-6-ethoxy-8-methylthio-9-(2-O-tosyl-1-β-D-ribofuranosyl)-9H-purine
2'-deoxy-8,2'-methanoguanosine