xanthosine
9-[2,3,5-tri-O-(tert-butyldimethylsilyl)-β-D-ribofuranosyl]-N6-[(1S)-phenylethyl]-2,6-diaminopurine
2′,3′,5′-tris-O-(tert-butyldimethylsilyl)-6-O-[2-(4-nitrophenyl)ethyl]guanosine
Acetic acid (2S,3R,4R,5S,6R)-4,5-bis-benzyloxy-6-[(2R,3R,4R,5R)-5-(2-benzyloxycarbonylamino-6-oxo-1,6-dihydro-purin-9-yl)-3,4-bis-(tert-butyl-dimethyl-silanyloxy)-tetrahydro-furan-2-ylmethoxy]-2-methyl-tetrahydro-pyran-3-yl ester
Acetic acid (2S,3R,4R,5S,6S)-4,5-bis-benzyloxy-6-[(2R,3R,4R,5R)-5-(2-benzyloxycarbonylamino-6-oxo-1,6-dihydro-purin-9-yl)-4-sulfooxy-2-sulfooxymethyl-tetrahydro-furan-3-yloxy]-2-methyl-tetrahydro-pyran-3-yl ester