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 3-[2-oxo-2-[3-(thiophene-2-carbonyl)piperidin-1-yl]ethyl]-1,3-oxazolidin-2-one is given. What is its corresponding molecular formula?
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C15H18N2O4S
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