You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-(ethylaminomethyl)-2-methyl-N-[(5-methyl-1H-pyrazol-4-yl)methyl]thiophene-3-sulfonamide by IUPAC nomenclature, provide its molecular formula.
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C13H20N4O2S2
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