3-((2R,4S,5R)-4-((bis(phenylthio)phosphoryl)oxy)-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-isobutyryl-9-oxo-5,6,7,9-tetrahydro-3H-imidazo[1,2-a]purine-6,7-diyl bis(2-methylpropanoate)

3-((2R,4S,5R)-5-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-4-((bis(phenylthio)phosphoryl)oxy)tetrahydrofuran-2-yl)-5-isobutyryl-9-oxo-5,6,7,9-tetrahydro-3H-imidazo[1,2-a]purine-6,7-diyl bis(2-methylpropanoate)