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 methyl 5-[[4-ethyl-5-(furan-2-yl)-1,2,4-triazol-3-yl]sulfanylmethyl]furan-2-carboxylate into molecular formula.
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C15H15N3O4S
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