2-amino-6-chloro-9-[3,5-O-(tetraisopropyldisiloxane-1,3-diyl)-β-D-ribofuranosyl]purine

O-((6aR,8R,9R,9aR)-8-(2-amino-6-chloro-9H-purin-9-yl)-2,2,4,4-tetraisopropyltetrahydro-6H-furo[3,2-f][1,3,5,2,4]trioxadisilocin-9-yl) O-phenyl carbonothioate