A1IKV: 1-[(1~{S},3~{R},4~{R},7~{S})-7-[[(1~{R},3~{R},4~{R},7~{S})-7-[[(1~{R},3~{R},4~{R},7~{S})-3-(6-aminopurin-9-yl)-7-[[(1~{R},3~{R},4~{R},7~{S})-3-(4-azanyl-5-methyl-2-oxidanylidene-pyrimidin-1-yl)-7-oxidanyl-2,5-dioxabicyclo[2.2.1]heptan-1-yl]methoxy-sulfanyl-phosphoryl]oxy-2,5-dioxabicyclo[2.2.1]heptan-1-yl]methoxy-sulfanyl-phosphoryl]oxy-3-(4-azanyl-5-methyl-2-oxidanylidene-pyrimidin-1-yl)-2,5-dioxabicyclo[2.2.1]heptan-1-yl]methoxy-sulfanyl-phosphoryl]oxy-1-(hydroxymethyl)-2,5-dioxabicyclo[2.2.1]heptan-3-yl]-5-methyl-pyrimidine-2,4-dione
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