N2-acetyl-6-thio-9-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)guanidine

3′,5′-(1,1,3,3-tetraisopropyl-1,3-disiloxan-1,3-yl)-9-(β-D-ribofuranosyl)purin-2,6-diamine