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 N-(2-hydroxyphenyl)-1-[1-oxo-1-(2-thiophen-2-ylethylamino)propan-2-yl]piperidine-4-carboxamide is given. What is its corresponding molecular formula?
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C21H27N3O3S
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