| 2-cyanoethyl bis[2-(hydroxymethyl)-5-(5-methyl-2,4-dioxo-pyrimidin-1-yl)tetrahydrofuran-3-yl] phosphate; 2-cyanoethyl[3-hydroxy-5-(5-methyl-2,4-dioxo-pyrimidin-1-yl)tetrahydrofuran-2-yl]methyl[2-(hydroxymethyl)-5-(5-methyl-2,4-dioxo-pyrimidin-1-yl)tetrahy |
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