You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [[(1S)-1-[(2S,3R,5R)-4-amino-5-(2-amino-6-sulfanylidene-3H-purin-9-yl)-4-ethynyl-3-hydroxyoxolan-2-yl]ethoxy]-hydroxyphosphoryl] phosphono hydrogen phosphate is given. What is its corresponding molecular formula?
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C13H19N6O12P3S
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