6-O-benzyl-5'-deoxy-5'-N-(N-tert-butoxycarbonyl-O-benzyloxycarbonyl)hydroxylaminoguanosine

Trifluoro-methanesulfonic acid 2-acetylamino-9-[(2R,3R,4R,5R)-3,4-bis-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-9H-purin-6-yl ester

N-levulinylguanosine

2',3',5'-tri<(tert-butyldimethylsilyl)oxy>-7,8-dihydro-8-oxoguanosine

((2R,3R,4R,5R)-5-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-3,4-bis((tert-butyldimethylsilyl)oxy)tetrahydrofuran-2-yl)methyl sulfamate