3,4-Dihydro-6-phenyl-2-[(2-phenylethyl)thio]-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

3,4-Dihydro-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-2-(2-thienylthio)-9H-imidazo[1,2-a]purin-9-one

3,4-Dihydro-2-(2-naphthalenylthio)-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

3,4-Dihydro-2-[(4-methyl-2-oxo-2H-1-benzopyran-7-yl)thio]-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

3,4-Dihydro-2-[(2-methyl-3-furanyl)thio]-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

3,4-Dihydro-2-[(4-methoxyphenyl)thio]-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

3,4-Dihydro-2-[(4-methylphenyl)thio]-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

2-(Cyclopentylthio)-3,4-dihydro-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

2-(Cyclohexylthio)-3,4-dihydro-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

2-[(2-Aminophenyl)thio]-3,4-dihydro-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-9H-imidazo[1,2-a]purin-9-one

1,2,3,4-Tetrahydro-6-phenyl-3-(3,5-O-phosphinico-β-D-ribofuranosyl)-2-thioxo-9H-imidazo[1,2-a]purin-9-one

Guanosine, 8-phenyl-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-[4-(1-methylethyl)phenyl]-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-(4-hydroxyphenyl)-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-(2-furanyl)-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-(4-fluorophenyl)-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-(4-chlorophenyl)-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-[(triphenylphosphoranylidene)amino]-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-[[(2,3,4,5,6-pentafluorophenyl)methyl]thio]-, cyclic 3′,5′-(hydrogen phosphate)

Guanosine, 8-[[(3-fluoro-5-methoxyphenyl)methyl]thio]-, cyclic 3′,5′-(hydrogen phosphate)