(2R,3S,4R,5R)-5-(4-Amino-2-oxo-1(2H)-pyrimidinyl)-2-({[{[(2R,3S,4R,5R)-5-(4-amino-2-oxo-1(2H)-pyrimidinyl)-2-({[{[(2R,3S,4R,5R)-2-({[{[(2R,3S,4R,5R)-2-({[{[(2R,3S,4R,5R)-5-(4-amino-2-oxo-1(2H)-pyrimid inyl)-4-hydroxy-2-(hydroxymethyl)tetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-5-(6-amino-9H-puri n-9-yl)-4-hydroxytetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-4-hydroxytetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-4-hydroxytetrahydro-3-furanyl {(2S,3S,4R,5R)-5-(6-amino-9H-p urin-9-yl)-3-[(2-formamido-5-sulfanylpentanoyl)amino]-4-hydroxytetrahydro-2-furanyl}methyl hydrogen phosphate (non-preferred name)

(2R,3S,4R,5R)-5-(4-Amino-2-oxo-1(2H)-pyrimidinyl)-2-({[{[(2R,3S,4R,5R)-5-(4-amino-2-oxo-1(2H)-pyrimidinyl)-2-({[{[(2R,3S,4R,5R)-2-({[{[(2R,3S,4R,5R)-2-({[{[(2R,3S,4R,5R)-5-(4-amino-2-oxo-1(2H)-pyrimid inyl)-4-hydroxy-2-(hydroxymethyl)tetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-5-(6-amino-9H-puri n-9-yl)-4-hydroxytetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-4-hydroxytetrahydro-3-furanyl]oxy}(hydroxy)phosphoryl]oxy}methyl)-4-hydroxytetrahydro-3-furanyl {(2S,3S,4R,5R)-5-(6-amino-9H-p urin-9-yl)-3-[(2-formamido-5-sulfanylpentanoyl)amino]-4-hydroxytetrahydro-2-furanyl}methyl hydrogen phosphate (non-preferred name)