4-[[[[2-[[6-[(1-Ethylpropyl)amino]-9-(N-ethyl-β-L-ribofuranuronamidosyl)-9H-purin-2-yl]amino]ethyl]amino]carbonyl]amino]-1-methylpyridinium

4-[[[[2-[[9-(N-Ethyl-β-L-ribofuranuronamidosyl)-6-[(2-methylpropyl)amino]-9H-purin-2-yl]amino]ethyl]amino]carbonyl]amino]-1-methylpyridinium

4-[[[[2-[[6-[(2,2-Diphenylethyl)amino]-9-(N-ethyl-β-L-ribofuranuronamidosyl)-9H-purin-2-yl]amino]ethyl]amino]carbonyl]amino]-1-methylpyridinium

4-[[[[2-[[6-Amino-9-(N-ethyl-β-L-ribofuranuronamidosyl)-9H-purin-2-yl]amino]ethyl]amino]carbonyl]amino]-1-methylpyridinium

1-Deoxy-N-ethyl-1-[6-[(1-ethylpropyl)amino]-2-[[2-[[(4-pyridinylamino)carbonyl]amino]ethyl]amino]-9H-purin-9-yl]-β-L-ribofuranuronamide

1-Deoxy-N-ethyl-1-[6-[(2-methylpropyl)amino]-2-[[2-[[(4-pyridinylamino)carbonyl]amino]ethyl]amino]-9H-purin-9-yl]-β-L-ribofuranuronamide

1-Deoxy-1-[6-[(2,2-diphenylethyl)amino]-2-[[2-[[(4-pyridinylamino)carbonyl]amino]ethyl]amino]-9H-purin-9-yl]-N-ethyl-β-L-ribofuranuronamide

1-[6-Amino-2-[[2-[[(4-pyridinylamino)carbonyl]amino]ethyl]amino]-9H-purin-9-yl]-1-deoxy-N-ethyl-β-L-ribofuranuronamide

1-[2-[[2-[4-(2-Aminoethyl)phenyl]ethyl]amino]-6-[(2,2-diphenylethyl)amino]-9H-purin-9-yl]-1-deoxy-N-ethyl-β-L-ribofuranuronamide

1-Deoxy-1-[6-[(2,2-diphenylethyl)amino]-2-[[[2-[[[[1-(2-pyridinyl)-4-piperidinyl]amino]carbonyl]amino]ethyl]amino]carbonyl]-9H-purin-9-yl]-N-ethyl-β-L-ribofuranuronamide

1-[6-Amino-2-[[[2-[[[[1-(2-pyridinyl)-4-piperidinyl]amino]carbonyl]amino]ethyl]amino]carbonyl]-9H-purin-9-yl]-1-deoxy-N-ethyl-β-L-ribofuranuronamide

N-(2,2-Diphenylethyl)-9-β-L-ribofuranosyl-9H-purin-6-amine

N-[(1R)-1-Methyl-2-phenylethyl]-9-β-L-ribofuranosyl-9H-purin-6-amine