1-(3,5-Di-O-benzoyl-2-deoxy-β-L-erythro-pentofuranosyl)-5-iodo-2,4(1H,3H)-pyrimidinedione

1-(3,5-Di-O-benzoyl-β-L-xylofuranosyl)-2,4(1H,3H)-pyrimidinedione

9-(2,3,5-Tri-O-benzoyl-β-L-ribofuranosyl)-9H-purin-6-amine

9-[2-Deoxy-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-L-erythro-pentofuranosyl]-9H-purin-6-amine

9-[3,5-O-[1,1,3,3-Tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-L-ribofuranosyl]-9H-purin-6-amine

9-[2-Deoxy-5-O-[(4-methoxyphenyl)diphenylmethyl]-β-L-erythro-pentofuranosyl]-N-[(4-methoxyphenyl)diphenylmethyl]-9H-purin-6-amine

4-[5-O-[(1,1-Dimethylethyl)dimethylsilyl]-2,3-O-(1-methylethylidene)-α-D-ribofuranosyl]-1,4-dihydro-1-hydroxy-2-methyl-2,4,1-benzodiazaborin-3(2H)-one