You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule [[(1R)-1-[5-(5-amino-3-oxo-1,2,4-triazin-2-yl)-4-ethynyl-4-hydroxy-3-(hydroxymethyl)oxolan-2-yl]ethoxy]-hydroxyphosphoryl] phosphono hydrogen phosphate into molecular formula.
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C12H19N4O14P3
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