N2-isobutyryl-9-[3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-β-D-arabinofuranosyl]guanine

(6aR,8R,9S,9aR)-8-(2-isobutyramido-6-oxo-1,6-dihydro-9H-purin-9-yl)-2,2,4,4-tetraisopropyltetrahydro-6H-furo[3,2-f][1,3,5,2,4]trioxadisilocin-9-yl acetate

2,6-diamino-9-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-ribofuranosyl)purine

N2-isobutyryl-3'-O,5'-O-bis(tetrahydrofuranyl)-2'-deoxy-2'-fluoroguanosine

2,6-二氨基嘌呤