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 (2R)-N-[3-(2-amino-2-oxoethoxy)phenyl]-1-(thiophene-2-carbonyl)piperidine-2-carboxamide is given. What is its corresponding molecular formula?
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C19H21N3O4S
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