[(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-4-hydroxy-3-(phosphonooxy)oxolan-2-yl]methyl (3R)-4-({3-[(2-{[(1S)-1-{[(2R,3S,4S,5R,6R)-4,5-dihydroxy-6-{[(R)-hydroxy{[(R)-hydroxy{[(2R,3S,5R)-3-hydroxy-5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)oxolan-2-yl]methoxy}phosphoryl]oxy}phosphoryl]oxy}-2-methyloxan-3-yl]amino}ethyl]sulfanyl}ethyl)amino]-3-oxopropyl}amino)-3-hydroxy-2,2-dimethyl-4-oxobutyl dihydrogen diphosphate (non-preferred name)