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-cyclopentyl-N-(oxan-4-yl)-N-[3-(2-oxopyrrolidin-1-yl)propyl]propanamide is given. What is its corresponding molecular formula?
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C20H34N2O3
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