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-[(3,4-dichlorophenyl)methyl]-4-[(2S)-2-formylpyrrolidin-1-yl]-4-oxobutanamide is given. What is its corresponding molecular formula?
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C16H18Cl2N2O3
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