You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[(3S)-5-oxo-1-phenylpyrrolidine-3-carbonyl]-N-(3-phenylpropyl)piperidine-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C26H31N3O3
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