| [5-(4-amino-2-oxo-pyrimidin-1-yl)-3-[[3-[[5-(4-amino-2-oxo-pyrimidin-1-yl)-3-[[5-(6-aminopurin-9-yl)-3-hydroxy-tetrahydrofuran-2-yl]methoxy-hydroxy-phosphoryl]oxy-tetrahydrofuran-2-yl]methoxy-hydroxy-phosphoryl]oxy-5-(6-aminopurin-9-yl)tetrahydrofuran-2-y |
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