You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named methyl 3-[4-(2-oxo-5-phenyl-1,3-oxazolidin-3-yl)piperidin-1-yl]sulfonylthiophene-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C20H22N2O6S2
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